I spent 5 hours completing it. I enjoyed the hell out of it. The problem was that I forgot to save my game prior to getting back on my car to get the hell out of there. I crashed on liftoff and got a game over......
I was so furious that it hadn't auto-saved. I took an hour break to collect myself and redid the damn thing before going to sleep. I shaved three and a half hours on my previous time on the second attempt. I haven't played since but I'll be picking it back up tonight to finish the rest of the things that I need to do to 100% the game.
Ugh I don't wish that luck on anyone. Hopefully they patch an auto save on that place. Doing it in an hour and a half is very impressive!