Very pleased with my 5-star tune that I run on my 2012 SCREW.
A couple of notes: I run the 85 octane performance tune for daily use. The fuel efficient and daily/street tunes didn’t do anything for me. What I really appreciate about the performance tune is the improved throttle response and the more aggressive shift patterns. That said, I definitely pay for it at the pump. Average MPGs is only 12.7 for mixed highway and street driving.