This was my first build. It took a lot longer than I expected. Probably about 3 hours. I accidentally installed the cpu cooler the wrong way, so I had to unscrew it and flip it around. Then when I was screwing in the motherboard, I dropped a screw and couldn't get it out by shaking so I had to take the motherboard out. Same thing happened when I was screwing down the graphics card. I first took out the graphics card, but couldn't find the screw so I had to take out the motherboard again.
When I finally finished everything and plugged it up, nothing happened. I took the panels off, and looked at everything. It all appeared to be right, so I was really worried that my motherboard was broken or something like that. The first thing I did to try to fix it was to unplug the little cables for the power and stuff. That didn't work. Then I realized that I plugged it in to the wrong place because I misread the label on the mobo, so I put them in another spot with the same amount of pins and it work!
I haven't had time to do anything on it like installing windows, but it was very fun building it. Can't wait to game on it!