I've seen soooo much shit on the internet about these trannys breaking and not shifting and just don't get it. This is my 5th new Mustang in 10 years and the 2011 is BY FAR the smoothest best shifting of any of them from the factory (02 GT, 03 Cobra, 06 Roush, and 07 Roush). The 02 and 03 had miserable stock shifters and were notchy and noisy as hell with the Pro 5.0's that I put in them (plus the stock TOB in the Terminator had a very short life- 5k miles if I remember right). The 06 and 07 sucked with Pro 5.0 and Roush shifters but kicked ass with the MGW.
I have 21 passes on the '11 (stock shifter and clutch) and the only bad shift related runs were me "launching" in 3rd once and the dreaded clutch stuck to the floor issue once while attempting to powershift. I even bent one of the stock 31 spline axles that are considered fairly durable but the tranny is holding up just fine. So I don't get it. First stang I've ever owned that I didn't buy a shifter in the first 3 months, never missed a shift (YET), and has held up beyond what the rearend did. I'm pretty damned impressed and happy with it for now.
Who knows, might blow like an underinflated Firestone on an Explorer on I-8 during the first pass this fall but till then I don't have a bad word to say about this tranny. I MIGHT get an MGW shifter based solely upon my past experience with them but if not I'm sticking with the stocker.