Yes...I admit I took forever to do mine...but then again, I think there might have been only 1 or 2 waiting after me. Also, I had no idea what I was doing...once I figured it out on the first side, the other went a lot faster lol.
If you don't want to crack your paint, I would say you need about 1-1.5 hours if you're just doing the rears. It's something you DON'T want to rush. It also helps if you have someone helping you apply the heat with the heat gun. The key is to constantly apply the heat evenly...then use the roller a little bit, then heat, then roll, etc. I'd say the majority of the time is spent heating especially if it's cold outside. For the MS3s...start at the very top towards the rear of the car and work your way down and to the front of the car. I started with a very slight angle and work your way to rolling it completely flat. I'll probably show up to lend a hand.