I've owned 2 Superchips ... first one for my past Trans Am and a 2nd one for my new truck. 5-Star Mike's 93 octane performance tune on the SCT X3 is much better than the Superchips 91 performance tune. The 5-Star is a very aggressive tune and it screams compared to the Superchips tune which sorta' just growls.

Superchips tune is a good basic canned tune, whereas, you pay a little more money to get a more aggressive tune from Mike, which is weeeeell worth the few extra dollars. Superchips is about 4-5 miles from me and their support has always been inferior over the past 10 years I have dealt with then. Mike's great.