Not so great. Read this review.
By Centrist49 on
2009 Toyota Prius Standard 4dr Hatchback (1.5L 4cyl gas/electric hybrid CVT)
Lots of rattles while driving. Also, if you want another "key" the dealer charges $300 (yes, three hundred). MPG is great, right at 50 MPG. Has Toyota's cheap, cheap carpet and floor mats. You'll want to buy something to put on top of either or expect worn out, thread bare mats/carpet. Maintenance costs are astronomical (good thing you save on fuel cost to pay for any maint. required). Also, road noise will drown out radio at 60+ mph.
Definitely the mpg and the incredible air conditioner.
Needs to be quieter. Road noise is excessive. New key shouldn't cost $300.