I agree to test the screen before closing it up! I read this and was so glad I did, even though everything worked fine on mine. The hardest part was getting my screen off because it was pretty shattered and I ended up breaking it (albeit carefully) in order to get it off. Took like 3 hours to get the screen off because I was trying not to snap any ribbons. I recommend having a vacuum cleaner to clean up any glass as you work, and you can use an eyeglass microfiber cloth to get the fingerprints off the LCD before you close it up. All in all, I would recommend also getting the additional adhesive strips. I didn’t, and my seal isn’t completely the best, but it’ll work with a nice case. This was difficult, but if you have a lot of patience and time you can do it.