1 - 2 horas
My PS3 had the "yellow light of death." It refused to turn on and I thought it was game over for this thing.
The repair process was fairly easy. It just took awhile. I would say it took me about 3 hours in all to take apart the PS3 and put it back together. It could have been quicker but I took my time because I didn't want to mess anything up. After it was done, I turned on the PS3, and it worked just like normal. PS3 lifesaver for sure!
Advice: take your time, and be patient. Follow the directions on the website and YouTube video. Give yourself about 3 hours or so to get this done (unless you have a lot of experience taking apart electronics).