For whatever reason Superchips have been conservative with their remap on the GTI, I'm sure they could squeeze more if they wanted to.
IMO the Revo remap is briliant, it gives a massive increase in midrange torque but it does tail off little at high revs. The tailing off is not a fault with the Revo map, its just how the GTI engine is.
If you decide yes after the trial...... actually, when

you have it remapped after the trial make sure the dealer sets up the fuel, timing and boost properly. Get him to explain it to you.
I agree with Pany & Hurdy on the DV.