I agree. It's a great tool when you've done something and want to see how it's changed the operating conditions of the engine. Especially helpful if you encounter a check engine light. It takes some getting used to in order to get the most out of it though.

Well, I went ahead and ordered one. $123 for the Tricom :D

I've been using AutoTap, but it's "club property" and only a GM version. Now I don't have to share and I can connect to most any OBDII vehicle. I'm pretty excited. Should be here tomorrow.