An Essential addition for any vehicle and especially the Prius!
Apart from the ScanGauge2 being an easy to use code reader, and having more comprehensive daily, tank & trip data than any OEM trip meter i've ever seen, the built in gauges give me all the conventional info my existing displays don't and the X-gauge function allows me to program in (with the help of Prius users group spreadsheets) an additional 24, Prius specific gauges that I couldn't get anywhere else for such a reasonable price. The ability to match my dash display color and intensity is a plus too. And, last but not least, being able to make simple ECU program changes to alter things like the Prius back up beep (change it from anoying, continuous tones to just one) makes the Scangauge the best all round addition to this and any vehicle I can imagine. A must have accessory.