I just installed the V11 myself and I really like what they did to the shifting. It seems "crisper" - it also took my Learned Octane Ratio (LOR) from -.36 to -1 (a good thing). Throttle response seems better too. I believe they use less timing/boost at part throttle then V10. The V10 tune was causing my car to knock a bit at part throttle which affect my LOR and possibly hurt performance down low...Now unfortunately with V11 while it seems to run great I logged it and I've got a consistent 3-6 degrees of knock at WOT through most of 3rd gear. I just did new plugs, oil, and filter. No misfires and like I said it runs fantastic but it causes me a little concern. I'm also running the 91 tune on BP 93 gas (albeit crappy winter gas). I just mixed some Ethanol in to target E15 and will see if that makes a difference - I don't know if it's just my car or the V11 tune - or if Livernois is fine with that much knock and I shouldn't worry about it. I plan on emailing them to get their opinion as I'm guessing my car just doesn't like it for whatever reason. Worst case I will go back to V10 which I was very happy with.