This mount is extremely solid and well-machined, it's heavy with extra screws and nuts (in case any get lost). The instruction paper is detailed, and the mechanism that locks it to the desk works very well.
Some manual installation is required as it comes in pieces. The main shaft locks onto the desktop with an adjustable mount with a large no-slip rubber grip. This is secured to the desk by locking the attached red lever in the upright position. From the pictures I was worried the lever action might interfere with items under my desk and make it difficult to lock or release when needed, but the lever is small and very low profile.
You insert 4 sliding square nuts into the vertical desk mount and screw the included L-bracket into the nuts. Then you screw the shifter/ebrake mounting tray onto the L-bracket. You adjust the tray up and down by loosening the L-bracket screws and lifting or lowering, then tightening them.
There are plenty of holes and screw patterns that I was able to mount my equipment to the tray.
I wish I knew what the negative reviewers were complaining about - saying it keeps falling down or not staying secure or that the lever system doesn't lock as tightly as bolting it to the desk would. What are you doing to it? Did you receive a broken one? I can't imagine this mount wouldn't be anything but rock solid with proper installation.
Those kinds of reviews are enough to turn a person away, but I'm glad I gave it a try. It's just what I needed and despite the brand name I've never heard of, it is well-made and exceeded my expectations.