40 minutes - 1 hour
I was taking my iPhone 5 from my pocket, like I have done a thousand times, and had lost control of it. It fell perfectly flush to the cement. Face down, like buttered toast. The screen shattered, and the display looked like a spider web. I am a tinker-er and decided I would attempt the fix myself.
It was very rewarding. Things went smoothly!
Slow and steady, follow the guide and the comments, they were very helpful. Use a hairdryer for contacts by the front facing camera and home buttons. Be sure when you are using the hairdryer, to move away from the workspace that your screws are on, you don't want them to fly off! Be patient.