i have tried REVO on few peoples cars and they are very good, and you wont be disappointed.
I previously had bluefin at stage 1, 2 and 2+ on mine but wasnt impressed, although being able to do it from home is a massive bonus. Since then i have changed to shark performance remaps with come with a handset as well. IMO much better and from he REVO's i have driven, definitely on par with them.
Initially had it on their stage 3, but since the mods have been removedi have moved to their stage 2 and am now on stage 1. Impressed with them all. Gets rave reviews on briskoda, alot of guys on there are mapped by im now as well.
The only guys i would let map my car would be
REVO
Shark Performance
APR