I've been using this controller for almost two (2) weeks now and I love it! I purchased it solely to be my main controller for PC and it has been flawless so far. I haven't tested it on many games, but I've been playing some FPS games and it's been perfect.I've been using the dock plugged into my PC with the 2.4ghz dongle left inside the base of the dock (USB pass-through) and the controller has been connecting perfectly fine with no discernable lag or any disconnections. I'll summarize everything in lists below:~~~~~SIDE NOTES:~~~~~-Windows 10 recognizes the controller (via USB wired or the 2.4ghz dongle) as an "Xbox 360 Controller" in the Device Manager (and GamePad Tester), but recognizes the controller as "Ultimate Wireless Controller" in the Bluetooth and Other Devices Settings... weird!-Steam (PC) recognizes the controller as an "Xbox One Controller" via USB wired or the 2.4ghz dongle.-Nintendo Switch recognizes it as a "Switch Pro Controller" via Bluetooth.-It came with firmware version 1.01 installed on it, which I am currently still running with no issues for my purposes so far.-Note that this is the "Ultimate Bluetooth Controller," which is DIFFERENT than the "Ultimate Controller" and "Ultimate Wired Controller." The latter two don't have the Hall Effect joystick module sensors.-Included in box = controller, pair of joystick covers, dock with 2.4ghz dongle, multi-language manual, and a 1m long USB-A to USC-C cable.~~~~~PROS:~~~~~---Features:----HALL EFFECT JOYSTICK MODULES! The main reason why I got this controller. These do not use the conventional potentiometer joysticks that you find in every other controller on the planet which will eventually wear out components and develop joystick drift. These use GuliKit's Hall Effect joysticks (magnets) and is theoretically immune to joystick drift. The springs in the joystick modules will wear out first before the sensors get drift, which is amazing. No planned obsolescence here!-BACK BUTTONS! Second main reason why I got this controller.-Very long 1000mAh Lithium-ion 22hr battery life! With the use of the dock, however, you wouldn't really need to worry about this often.-ZERO deadzone out of the box from the factory. See the joystick axis values in the Gamepad Tester image... all 0's!-Free pair of rubber 8BitDo joystick covers included in the box.---Interface:----Joysticks are smooth and feel great. Clicky and responsive.-Face buttons feel great (rubber membrane type).-D-pad feels great (rubber membrane type).-Back paddle buttons feel amazing (clicky tactile type).-Analog triggers are buttery smooth.-Shoulder buttons feel great (possible rubber membrane type).-2.4ghz/Bluetooth switch on the rear of the controller.-Turbo button if you're into that (I don't use it).-If you're playing on a Switch or something that allows multiple controllers, there are square player # LED indicator lights on the front side of the controller (underneath the profile # LEDs).---Ergonomics:----Very comfortable! But isn't as good/ergonomic as my old Xbox One controller (subjective).-Nearly the same size as my old Microsoft Xbox One controller (see pictures).---Connectivity:----2.4ghz connectivity (with the dongle; dongle can be in the base of the dock and the dock plugged into your PC if you want, or you can take the dongle out; both work!). No discernable lag with this vs a USB wired connection!-USB-C hard wire connectivity.-Bluetooth connectivity.-Works great on PC and Nintendo Switch (and apparently also Steam Deck; see Neutral section).-Connects to and works on my Android phones (tested on Samsung S7E and S21) for games. Even allows me to navigate apps on my phone's home screen.-Shake the controller to wake up a sleeping Nintendo Switch.---Construction:----Solid construction and feels high quality in hand. No creaking or cracking when holding and squeezing the controller/trying to twist and bend it.-A bit lighter than an Xbox One controller.-Shell is made from hard plastic with no rubberized/soft touch materials (which I like) and the grips have this texture on it made from little hard dots which is surprisingly grippy!---Dock:----High quality dock also features a spot to store the 2.4ghz USB dongle; what's better, is that this acts as a USB-passthrough so you don't actually have to take the dongle out! Just plug the dock into your PC and it'll activate/utilize the dongle as well as act as a dock to charge your controller.-There are little magnets inside that help align the controller, so that's helpful.-There's a soft white LED light bar at the bottom of the dock that indicates the controller is charging, which is a nice touch in my opinion.-There's a rubber ring/pad underneath the dock to keep it from sliding around on a desk.---Software:----Fantastic software for remapping buttons, setting profiles, setting deadzones/other sensitivities, and creating macros. Works flawlessly for syncing settings to the controller on the Windows 10 software.-Settings are stored locally on the controller, so you don't need to have any software running in the background!-Software available on Windows 10, Android, and iOS (iPhones).-Controller supports 3 custom profiles, with technically a 4th profile being no profiles on (profile 0, 1, 2, and 3). This is indicated with the three circular LED dots in between the D-pad and right joystick. The profile switcher button is directly above these LEDs, underneath the middle 'star' button.---Price:----MSRP is $70 USD but I got this controller at Amazon Canada for $76.99 CAD (maybe a price error in my favour? Since this converts to $57 USD) around two weeks ago from the official 8BitDo Canada seller/vendor, shipped by Amazon via Prime.-For this price, you're not going to get anything better out there for this quality and amount of features (I'm mostly comparing it to the first-party controllers).~~~~~NEUTRAL:~~~~~-Joystick tension is slightly greater/heavier than that of my old Xbox One controller joysticks. Not bad, but I would prefer it to be a bit lighter.-I haven't tested it myself but apparently when using it on a Steam Deck, there's a bug where once you've connected it, the controller won't actually control anything (connected but no input registration). You need to fully turn off the controller by holding the main home button, then turn it back on for inputs to be registered. This is something I've seen on YouTube reviews.-Vibration motors on each side of the controller are different sizes (internally) resulting in a strange vibration feedback. Not a bad thing for me, though. At least you can control the strength of the individual motors in the software!-I haven't tested the gyroscope, so I can't comment on that.~~~~~CONS:~~~~~-Not a fan of the BAYX face button layout (Switch layout) as I'm using it mainly for PC, so I would prefer an ABXY layout and 8BitDo does not offer this for this controller, nor do they currently offer replacement buttons... maybe one day? EDIT: 8BitDo now offers replacement Xbox style (ABXY) buttons on their official shop website!-Judging by online reviews, there seems to be connectivity issues with the controller and some devices out there. I haven't had any issues with this.-Gamepad Tester circularity test error rate is a bit higher than I would've expected considering it has absolutely 0 deadzone from the factory. I guess having no deadzone doesn't mean anything for circularity error. I haven't noticed this affecting precision in FPS games, though.-No NFC (I don't need it).-Battery is non-replaceable.-No controller travel case included.-Unable to use gyro functions in 2.4ghz mode - must be in Bluetooth mode for this.Overall, I haven't had issues like many other reviews out there. It's actually been near perfect for me. Who knows, maybe they got lemons and I didn't. Either way, I'm extremely happy with this controller and should last me a very long time considering it won't ever get stick drift. I would highly recommend this controller over all first party controllers out there. What makes it even better is that I got it for less than the MSRP!