Revo are alot better with aftersales to be honest, Your Vehical is your own and if it goes Bang then good luck with trying to settle with him, or Rtech or whoever he is. Who produces their maps??? superchips?? more then likely.
Revo have been doing this for years and personally with my 15k's worth of metal, i wouldnt want to chance it. but ETTO. i know Dan (cookiemonster) had his done but he chose too.Hes done a few Vw's, but in comparision to Bluefin or Revo...... buttons.
Its your decision ultimately, but bear it in mind. To save a few quid just because its cheaper , like buying a can of beans, eat the value stuff or have the peace of mind with a fully researched map, and eat the real heinz!