Have managed with this set to replace the defective Homebutton my Iphone 4. While it was a bit tedious (especially because you have to disassemble the unit for exchanging almost completely), but just right for me as a layman only using the included tool and a video tutorial possible (although I but some times resorted to tweezers to me fiddling with to facilitate the small screws).
The tool kit is, of course, not brilliant quality but it makes its service. In particular, the screwdriver I liked (magnetized). The two levers tools made of plastic, however, are not very good. They are so soft that they bend after a short time. I had a couple of times to smooth polish sandpaper again, so that they fit between the display and housing. It may be that the intention is to prevent damage to the levers. But still a little tougher and especially sharper tools would have been helpful.
I am still very pleased with this set. I can anyone who trusts himself to replace the home button itself, this highly recommend here.