First, thank you in advance for pointing me in the right direction. I have tried to search the forums here to no avail. It seems there is very limited info regarding the ultragauge on the prius. I know that in the FAQ it says that it *may" turn off with the ICE, I was just wondering if anyone had any experience on how much of an effect this is. This is, perhaps my biggest hesitation in buying this product. For $59 USD, it offers a lot of features. Another option is to use a smartphone application. Unfortunately, I use WM7 (which I love!), and has no OBDii app support. There are tons in the android market however, my only android phone is a G1 (upgraded to Froyo 2.2). I downloaded the Torque app and it looks ok. It is a bit laggy on this old platform, and the screen is kind of small, but still bigger than a scangauge. I have also looked at the Priidash and use my atom n450 based netbook planted on the dash. (Although looking at the install process seems a bit of a work). In anycase, any input would definitely help! Thank you! I guess my question is should I buy an ebay USB OBDii/bluetooth with the G1 or get the ultragauge.