I have an 04 Prius with 117000 miles on it. In the earlier years I had all the problems with the car stalling or not wanting to keep going, but Toyota finally resolved those issues with software upgrades and recalls. For the past 3 years I've had no problems. At 112000 miles I needed a new water pump, but otherwise I've had no mechanical issues. The battery is fine. I drive exclusively on local roads, 40 miles each way to work, and get 48 mpg during the winter (New Hampshire winters are brutal) and am now getting 57 mpg in the Springtime. The car gets significantly less gas mileage if I only use it for short hops (5-10 miles) or if I drive on the highway.
† Edmunds.com received the highest numerical score in the proprietary J.D. Power 2014 Third-Party Automotive Website Evaluation Study℠. Results based on responses from 3,381 responses, measuring 14 companies and measures third-party automotive website usefulness among new and used vehicle shoppers. Proprietary study results are based on experiences and perceptions of owners surveyed from January 2014. Your experiences may vary. Visit jdpower.com.