I've got the GC coilovers and they are awesome. Nice and stiff. Installing the rear coilovers were a b****. Here is a tip for anyone doing them. Seatbelts will not go back due to their design. they will take all the belt and not let it out. the way to fix this is to install it back the way it was and pull the belt back down and bolt it back on. It's hard to explain but the belt will not let out unless in the position it was in
We did the GC's as well on our MP3. It worked great considering there aren't any strut options. It's nice to have the better valving in stock form with the MP3.
Definitely reccommend for great handling. We saw a drastic improvement at autox.