The real time feedback is an amazing training tool. While I don't own a hybrid, I purchased a ScanGuage II that connects to the OBDII port on my 2004 Ford Freestar. With the real time feedback, I have made changes that increased my MPG by nearly 3 miles per gallon. At the current prices for gas, I paid off the ScanGuage in less than a month and now just keep realizing the savings.

Go to www.cleanmpg.com for tips to improve your mileage as well as a group purchase discount for your very own ScanGuage.