Great review! Yes, the servo mapping makes the car more "sucked" onto the road, very little upsets the stability of the car, it just locks onto dead center with very little corrections needed, it's a very satisfying feeling. Also, the added weight seems to have a positive affect on road feedback, a great thing.
A little jealous that you got the GTS tune, I don't have it yet
but I should soon
Can't wait to try it out, everyone on here raves about it!! If it's anything like the Servo, I'll definitely love it! (Stage 2 is great too, I just can't get over how it feels like a better overall package, it's like stock, but 10x in intensity with test pipes)