I use the iOBD2 reader religiously!
I've been using the iOBD2 reader religiously since I got it. It's been a great addition. I shows me my instance fuel mileage as well as my average mileage. I've also set alarms to notify me of any overheating (fortunately I haven't had any!). I would highly recommend getting one. Watch the reviews...the first unit I bought I couldn't get to connect to my device (it was really cheap). The second attempt, I spent a light more (less than $50) and it was a snap to connect and has worked flawlessly ever since. Mine creates a Wifi network, I believe some of the new units can work with Bluetooth.
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