R-Tech get better praise over some other tuners, not just because of the cheaper price, but because the service is more personal - its not just a quick plug in laptop, flash the map & go, you get a health check, dyno run and bespoke tuning to your exact setup / cars potential. it takes 2-3hrs to do it properly, so its great value for money.
you also get the following included within the price:
- Traction control mapping (makes traction control useful)
- switchable maps
- Dyno print outs
- Linear throttle map (if you want it)
- Mapping using VVT and removal of ECU torque intervention - allowing smoother delivery
There really isnt anything "wrong" with Revo, Shark etc at all, theres loads of cars on here mapped by them. Just remember that if you disconnect the battery for any reason, the Revo settings are lost and the car goes back to standard-ish. You need to return to your local revo installer or buy and SPS switch (£150 IIRC) to reinstate the settings.
As you can probably appreciate you arent the first person to ask this question, so read all the reviews and make a decison for yourself, looking at what is important for you (location, price, extras etc)We all have our favourite tuners on here so the next guy will probably say APR or Revo have done him well. . . .
My advise is - Whatever tuner you go to, make sure its a well reviewed tuner discussed on the forum, dont be tempted by a local place offering £150 remaps - it always ends in tears