I have fixed 3 iPhone 4s with cracked screens with the tool kit and noticed immediately my time in fixing them shortened greatly due to the different tools available!
The repair went flawlessly everything you need is there in a nice organized storage unit.
The only problem I could find we're the cheap plastic prying tools that were included in the sleeve and no tool for removing sim cards from iPhone. I have found many times that I have needed that and I thought this tool kit came with it. But overall this tool kit is great any person that is wanting to get into fixing not just iPhones but any electronic device should invest in this tool kit.