I find that the 5 star tuning did increase my performance and the 5 speed shifts so much better, no more going from 5th gear to 2nd gear with cruise on in the hills/mountains, now it goes to 4th and than to 3rd if need to in the bigger hills, note I am towing 6000 lbs, my performance on my V-10 did increase and it never goes over 4500 rpm's now with 5 Star but note I also have the full Banks system installed from cold air intake to headers and exhaust.
I think the 5 star did so much better than the Banks system, but it also appears that the 5 Star did wake up the Banks system in my V-10 because it seems like I gained 50hp and 50 lbs of torque.