Does anyone have and use the ScanGuageII in their car? It is like a trip computer where it monitors fuel economy, distance traveled, etc. It is also a scan tool to help with troubleshooting and is able to reset the "Check Engine" light. My car already has a trip computer so I don't need it but I'm thinking of getting one for my wife's Mazda and I'm just wondering how people like it. Oh, their website is http://www.scangauge.com/