I never take my phone out of it's case (a lifeproof case at that)but the one day that I do I dropped it. Thankfully it wasn't face down, but the back of it shattered.
The repair was SUPER easy. I literally unscrewed the screws on the bottom. Which I was totally paranoid about dropping and losing. Slid the back piece off switched the backs. Pushed the back back down, put the Philips screws that came with my liberation kit into the old holds for the pentalobe screws and went on my merry way with my phone SO much easier to get into now.
You'd have to have the mental capacity of a kindergartner or younger not to be able to use this kit. It's that easy.