Note: I have included an edit to the review at the end.I'm giving this screen protector a 2 star review knowing it could've gotten 5 stars if it were not for one fatal flaw: it started forming a bubble under the screen about 3 weeks after installing it. It started as a very small bubble and expanded to what can be seen in the photo within a few days.Aside from this flaw, the screen protector is smooth and feels very good. The included installations tools are great given the price point, and the installation frame works well if you know how use it, as I'm used to manually aligning the screen protector myself. I messed up the first 2 installs mostly of my own fault, but was able to install the 3rd screen protector seemingly perfectly. There is an enough of a gap at the phone's edges, allowing all my cases to work well with the screen protector without displacing/interfering with the screen protector.Unfortunately, for all it's positives, this flaw ruins the whole experience as the screen protector cannot be used long term, which defeats the purpose (unless you are unbothered by this). If ESR can fix this flaw, this would be a perfect screen protector, especially at this price point. I can't say for sure if this is a one-off issue, since I ruined my first two installs. However, I've seen other reviews pointing out this flaw, so I'm reporting my experience regarding it as well. I did try to heat the screen protector using a blow dryer in hopes of maybe softening the adhesive and getting it to stick again, but that doesn't work.Since this screen protector is well-reviewed, I'm hoping this is not as widespread of an issue. Just beware that it exists.EDIT: ESR customer support reached out to me regarding the issue I was facing as described above, and have offered to rectify the issue through a replacement or a refund. I have accepted a refund instead of a replacement, as I had already bought a different set to replace the one pictured in the review. Knowing that ESR would reach out and take care of the issue gives peace of mind, indicating that ESR stands behind their products and will appropriately resolve the issue. As such, I have updated my review from 2 stars to 4 stars.Do note that ESR themselves are the ones who reached out, not the Amazon seller. I cannot comment on the seller's customer support, as I had not reached out to them regarding this issue. Finally, had I not purchased a different screen protector set and opted for a replacement from ESR, I would have likely updated the review to 5 stars once I have confirmed that the bubbling issue is a one-off (i.e. the unit I received was defective). Will definitely consider ESR products for future accessory purchases!