I have the ThunderMax with the Autotune on my FXDC 07. Running with a set of Rineharts and Stg 1 SE suction. I used map# 403 and the system is on the learning mode in a closed loop. I've only done about 100 miles, popped a bit when I did the first run and then it corrected after a few miles. I haven't been able to try it full throttle in 5th (don't use 6th....), but so far my bike has never run this good, even with my previous set-up running with the PC III-usb. It really does improve the whole rpm range in power/torque.
Expensive? maybe a bit, but really worth it; and no more guess work as it learns and improves itself as you ride!!
BR,
Spanish Flyer