I have less than 1,000 miles and I'm not as impressed with the 8-speed as I thought I would be. I'm sure that it's performing fine but I expected quicker and more decisive downshifts when I step on it. Not a big improvement over my JK's 5-speed auto in that one dimension. Besides the diesel, I expected the tranny to be the biggest improvement over the JK. Additionally, I think that FCA has a "safeguard" on the diesel engine/transmission to initially take some of the edge off the torque delivery - at least from a dead stop. I could be wrong, but there is a subtle hesitation that I don't attribute to turbo lag.