I had the Bluefin Superchips on by 2.0T Quattro A3 and it was certainly worthwhile. There was a deal on at my local VAG specialist and I think I paid £400 all in.
I then changed the A3 2.0T for an S3....and because less then a year had passed since I had purchased the Bluefin device, I was able to transfer the map (after another upload to the Superchips server) Free Of Charge because it was another 2.0Tfsi engine.
Superchips do offer a "conservative" remap, say "only" 20-30% power and torque gains, but they offer a comprehensive 12 month warranty and being one ofthe most establsihed palyers on the market you can be assured it will have been well developed and tested. Sure there are other cheaper and more powerful maps out there, but Superchips have "pedigree".
Only piece if advice I'd give is whatever map you go for, make sure you have the Diverter Valve (DV) replaced with a more recent OEM one (designed for cars such as the S3\ Golf R MY09 +) because the diaphragm is much more durable. Mine went on the A3 2.0T Q almsot as soon as I loaded the map on. So I had the DV upgarded on my S3 (it's an 08 plate before the upgraded DV became standard fit) before I loaded the map on as a prevetative measure. My local VAG indy charged me £70 all in.