Works for me!
Bought this unit for my '08 Taurus SEL. Tuned my car for premium fuel, firmed shifts, raised shift points, raised rev limiter, and recalibrated the speedometer (I have aftermarket 20" rims). There's a marked improvement in transmission/throttle response and when I gun it, she goes. Bought this unit on sale for $288, and I haven't looked back since.