Loved it, but it stopped working.
I bought mine in May of 2015 for my 2011 Dodge Charger. It was awesome. There was a few adjustments I'd like to have been able to do that it didn't feature for my car. But other than that, I loved it. One day I plugged it in and the screen just lit up with no display, a blueish black color. I plugged it into the computer. Same result. And just to add in one more comment for everyone, it feels pretty cheaply made. But it worked very well. (For the time that it did.)
Couldn't really tell any difference on 87 octane but it did seem to come alive a bit on 93. Throttle response is definitely quicker though. I'd probably buy again just because I've heard bad things about the more expensive units on the market. Don't really think it helps gas mileage either. I do however have a CAI on the way & put exhaust on last month so we'll see how all the mods work together.