[supremeefi]

Yes, I've done a few in the last year or so. There's one or two on here that I did via email.

I was all giddy when I got the chance to tune one for the first time. Saw all the advertisements etc. I though I would be impressed. Instead I was very disappointed.
Does it have some neat features? Absolutely, i.e. E85/Flex Fuel capability, traction control (although most say the MSD 7 one works better), self learning etc.

But it only has 2 transient fueling tables, most other systems have 4 or 5, very important for the ultimate in drivability, no secondary MAP sensor and the individual cylinder trim for fuel and spark is an all or nothing calibration. In other words, you can't tailor the individual spark and fuel by rpm and/or load so it's useless in most applications. Plus the self learning can cause problems, and that only saves the tuner an hour or so anyway.

Just remember one thing. Just because something is advertised the most doesn't automatically mean it will be the best. And especially lately I've heard their tech ain't all it's cracked up to be.