Very easy to use so far.
Reviewed By Michael H (Las Vegas, NV) Reviewed for a 2010 Dodge Ram —1/26/2015 9:37 AM
Great little device to quickly maximize your engine's performance. I have not gotten to the point of uploading any custom tunes, but I do like the ability to make minor corrections to the PCM for variables such as tire size and having a diagnostic reader available as well. As for the performance increase, IMHO it is an accumulative difference. Meaning that it seems much more noticeable with other bolt-on mods (CAI, headers, etc)