We rented from them in October. I was a bit skeptical as well. To sum it up, customer service is not their forte. Other than that, the car was perfectly functional, clean, and if you sign up for Blue Chip, no one pushed insurance.
I have two bits of advice. First, and this would apply to any car rental company, is to take the time to look the car over thoroughly. We had arrived for pickup at 1 AM and the lot was very poorly lit. We didn't see two dime sized dings on the car until the next morning. Thrifty's customer service line is ridiculously bad. We could never get through to report it. As a result, I was stressing the whole time, thinking we'd get charged. Even after we returned the car, filed the report, etc. I felt that I should have been able to get through my vacation without being put in such a stressful position. If they'd only answer their darn phone! That said, I was never charged, but it would have been nice to get through my vacation without stress.
My second bit of advice is to get your own map and figure out where you're going in advance. Every car rental company I've used before had full color maps and the reps always showed me how to get to my destination from their lot. Not Thrifty. They threw me a xeroxed copy of a map that you could barely read and sent me on my way.
So as long as you're okay with basically picking up your car and never speaking to Thrifty ever again, it'll be okay. If you need the reasurrance of being able to contact them for any reason, consider looking elsewhere.