15 - 30 minutes
Power button did not work whatsoever!
got the phone back together and it was like a brand new phone! could not be happier! took be a bit, because I have a 4 and I was looking at the instructions for the 4s, once I figured that out, it was very smooth.
someone here had the advise to print the steps and tape the removed screws/parts to the steps on the paper. this was probably the best advice of anything!