we've used it.
NSX on FI/C as well as a turbo TC that came to get tuned. we've recently installed one on a 2jz-gte is300 but there seems to be a file on the AEM chip that has to be updated in order for the TPS not to go crazy on it. This seems to be a symptom on the IS300 ecu's.
overall, its a nice system if you have boost. i like the fact that timing and fuel can be controlled on it and its easy to maneuver through the interface.