I believe if you only map your car once then no comparison so you'll know no better.
Most people who buy a GTI to modify it have modified cars before (I did the generic map thing on a Focus ST).
Loads of people on here get mapped by other tuners and say nothing about it, guy plugged in a laptop, fiddled about and I drive home with more power. Great. Can't fault it.
Whenever someone comes back from R-Tech it typically goes like this: took a long drive to Niki, had a chat with the lads, did some stock Dyno runs, Niki came over and explained what he is doing, and what was holding it back / flowing really well . He took me out for a spin and explained the characteristics.
For me, I'm yet to see any other tuners better R-Tech for any of this lot:
- customer service (pre & post map)
- power (James 378bhp & 450lb/ft from K04 2+ with WMI on JKMs rollers -blown everyone away)
- add ons (traction control mapping, switchable mapping from pedal)
- anti-flutter for K04 setups with intake, TIV mapping (patented by R-Tech)
- value for money (hundreds of pounds cheaper in some cases)
I've said many times, there's nothing wrong with the likes of Revo, APR etc. . But when you consider that little lot above it's hard not to choose R-Tech. Which I imagine is why they are so popular