Let's distinguish between sales and service. (A lot of reviews here don't seem to.)
My purchase experience involved a number of slip-ups, largely because of a trainee salesman, I think, and maybe a distracted manager.
Once I had my Toyota Prius in my hands, though, my service experience has been superb: friendly, thoughtful, efficient, and great about keeping me updated whiled I wait. Most recently, Steve Ogaard was excellent, but I must say all my contacts with the service department have been terrific. I had a somewhat complicated problem with a cracked windshield, from a small stone not an issue with the car itself. The service department was really helpful here, not just in recalibrating the system after the new windshield was installed, but also walking me through the insurance process and making it very simple.
I expect I'll stick with the Lia service people, even after my warranty expires. I know original dealer service costs more, but given my experience so far, it will be worth it.