I've had lots of remaps on different cars; AmD on a 1.8T, morebhp on a PD etc, and out of them all the R-Tech Stage 1 on my GTI has seen the best improvement in performance. It's just so nice to drive, really torquey.
I wouldn't usually spout on about certain brands/companies being better than others like some on here frequently do, but in this case I'd comfortably say that R-Tech are at the top of the game.