Only started a couple weeks ago so we've had 2 sessions. Too early to tell, but it's taken me a LOT of work to read through several books, decide which rules to go with or ignore, make a document to copy those rules to, and go through the character creation. And even then, I screwed up several things. I feel like it's probably a good system, but the barrier to entry is something the writers need to work on substantially. If my game takes off, I'm planning on posting my document to the GURPS sublemmy, but I don't have an ETA.

I did design the tutorial mission on the first level of Hotline Miami though.