15 - 30 minuten
Power/lock button stuck
The repair went smoothly even for a novice like me. Major advice is to be patient. If it is the first time you are opening your phone, beware that the rear panel might be a bit stuck and may not slide easily. The whole process took me about 40 min and I'd just reinforce that is very easy to loose both the small black ground clip on step 5 and the small grounding finger on step 25.
My only concern is that the iFixit guide tells you to remove the front facing camera in the process of replacing the power and sensor cable and I believe this is not really necessary. I also have a feeling that the power switch itself in not the defective part in most cases. I would order the Power and sensor cable only and try that first and save the $4.95 of the power/lock button.