45 minutes - 2 hours
Power button wasn't working. I just replaced the home button because I thought it would look cool and the phone would already be open so I thought, what the heck, why not.
It works better now. Still a couple clicks to get it working but that may also be my cases' fault. The process was pretty difficult and time consuming. The Phillips driver that was sent was so hard to use on the tiny screws inside the phone. I had to use a pocket knife to get most of them. And some screws alone took 10+ minutes to get out. It was pretty stressful but after I got all the screws out, the process and steps were easy to follow.
Look for a better Phillips screw driver. A smaller one than the one on this site. And use the YouTube video and written steps. But be careful because they don't take out the screws in the same order. Do it on white paper. Or on a white poster board. Use double sided tape. Place the screws on the tape and label above the tape where you got them from. Or an even better idea if you have any artistic ability. Make a enlarged sketch of the opened phone and place the screws around were you took them from.
iPhone 5 Power and Lock Button
Phillips #00 Screwdriver
Flathead 3/32" or 2.5 mm Screwdriver
P2 Pentalobe Screwdriver iPhone