I am really happy with mine. The only troubles I have had were not BD related, transducer and shift linkage.
Shifts are quick, firm and at the right Rpm's. TC is really nice as the stall is just were the Cummins shines, no need for throttle in some situations. Lockup is solid. I really like the way it downshifts automatically to 2nd when the throttle returns to idle anywhere between certain speeds. Helps a little in slowing a load.
Tech support and customer service was excellent. When I was trying to trouble shoot the transducer and shift linkage, Steve was right there for me and help me out until it was identified and fixed.
I am not a high HP truck owner but for what I do have I have alot of confidence that my transmission is up to the tasks that I ask of it.
I personally do not have a bad thing to say about the product or support. I would rate my purchase and product selection/choice an A+.
I hope my personal experience helps you out.