No complaints so far. Seems like a pretty smooth transmission - I don't feel most of the shifts. There are sometimes some small jerks as it is downshifting at low speeds, but nothing to worry about. The only thing I don't like about it is the lack of a dipstick. I would like to be able to check the fluid level periodically. I'm curious to see how the 150,000 fluid change interval works out. That's considerably longer than any past transmission and kind of surprising given the hard work that transmission does, especially given the towing capability. Hopefully it's not one of those things that breaks as soon as the warranty expires.How do you like 10 speed?