I drove a Prius for about a year and really liked it, except for the tail-gating drivers of monster pickup trucks.
Two observations: The Prius may have the most uncomfortable seats ever. I resolved the newer Prius would be my next car until it came out and I sat in it–a deal-killer for us tall guys.
Second, the feasibility of the Prius gets better the higher gasoline prices go. Studies of the “payback period” for paying extra for a Prius are obsolete if they are relying on last year’s gasoline prices.