I've got one: it works great!. I think it's a great little piece...and for $200...I'd jump on it. HOWEVER: beware if it has been used to program another truck! If it was used on another truck, and the stock program for THAT vehicle is still stored in it, it WILL NOT WORK ON YOUR TRUCK! Again, not sure how you're gonna do it, but try to verify it is "original" and not already profiled for another vehicle.
Good luck
Alan
Also, if you do get it, DO GET THE GAUGES as suggested. EGT temps. will go WAY UP when you're "on it"!