I just slapped on a new set of Bridgestone Ecopia tires on my 07 400h and so far I'm very satisfied. They had a $70 rebate and had a $30 discount off of installation at Costco. So far, the MPG increased from 29.5 to 30.3. The gas light usually comes on around 400 miles, but this time it came on at 417 miles. I guess they do save some gas by it's LRR technology. So far I'm very pleased with the new tires. They are replacing the OEM michelins.