Easy to install, on the fly tuning. Noticed better miles per gallon (about 3 miles plus highway, 2 in town) on performance tune running 93 octane. Better throttle response. Only other mod installed on this 08' A/C is a takeda short ram. Wanted to do exhaust header and underdrive pulley before programer, but got such a good deal, had to go with this first. Will work great with future mods. Satisfied.
No HP Gain
Bought solely for HP gain for my Altima Coupe 3.5 SR. Installed premium tune, high throttle sensitivity, and played with timing - didn't feel anything different. Decided to give it a chance - perhaps thought it might be doing something (was a placebo effect). 9 months later, un-installed and again noticed no difference in performance. If there is, technically, a HP gain, it's not noticeable. Very disappointed.