I've used Brenspeed, Lund and JPC. All 3 worked great, no complaints. I spoke to Lund about doing a Dyno tune. He didn't deny that you may squeeze a little more out with a Dyno, but was telling me that the benefit probably wouldn't out weigh the price for a N/A tune. The few times I contacted Lund with questions, he answered me the same day. JPC tune worked great also, they definitely check logs for you, because they asked me to do logs, so they could help me dial the car in. Customer Service couldn't of been any better. IMO all these tuners are excellent (Lund, JPC, Brenspeed, AED) the performance difference in the tunes are minimal. You're not going to gain 2-5 tenths, by switching between any of these guys, unless there was an error made between you and the tuner on the original tune. Track results are the only true gauge. Trans tunning in auto's may make the car feel different around town, but there is no miracle tune. I tried the top tier guys, all excellent, all very similar...
Is the data logging with the jpc tune similar to aed's...meaning do you have to have a 3rd gear pull to redline or something similar?