I had my previous car, Leon Cupra R(1.8T) mapped by APR and had no problems . It's a smooth map compared to Revo which is a bit more aggresive , but it did give similar performance figures on the dyno.
If you have cruise fitted you can also have a number of programs put on and switch between them which is nice.
Also if you have a laptop and a Vag com lead you can use V-Tune if you wish to tinker with the map to take into account different mods etc..
I would try the free trial first and judge for yourself
Julian