I just got my B&G PCM in and swapped out my stocker. The difference is night and day, especially for a guy like me that was running headers on a stock computer. So far it has only been in a couple days so the computer is still learning but I am sold. You still can't use a handheld to do anything but datalog. The PCM itself has the new parameters. High rev limit, higher speed, lower fan temp, etc. It's not an exact tune but it is a helluva lot better than stock! Stay tuned to my thread http://www.ramforumz.com/showthread.php?t=108221 on how I am liking it.