I replaced mine and honestly, the hardest part was finding a quality replacement part and that says a lot considering how hard it is to get the original back off. The issue with removing the back glass is that Apple uses some sort of top shelf glue that requires either freezing cold temperatures or high heat to break the bond. Theres a couple videos on youtube showing the use of a heat gun or dry ice to break the bond but that only gets it to the point of possible. Without heat, you’d be scraping little chips off of the back for hours and hours. Total time to remove the back glass for me was around 30-45 minutes with heat. Also, be aware that the camera cover is welded onto the frame and must come off in order to get the back glass on then the cover must be glued back down.