With the 650S package on 93 octane the output rose from 473 at all four wheels to 553 horsepower at all four wheels for a gain of 80 wheel horsepower on pump gas. That is not bad at all. On race gas with GIAC race software this rises to 594 wheel horsepower.
So, good bolt on power but AWE-Tuning wants $13,195.05 for this package (the extra 5 cents there being just kind of funny) which is kind of absurd for software and bolt ons. The 997.1 turbo is falling in price and there are far more cost effective options than this. Especially when the race software is another $400 on top of this and additional ECU programs are $200 each.
Good results, not the best value.