Dollar is onsite and their cars are pretty much like everyone elses. I have rented from them several times and with the exception of right after the hurricanes last year the cars were in good shape. Their intermediate cars are usually Dodge Stratuses.
Dollar was good about going thru the car with me when I inspected it for damage and I had no problems at return.
I haven't rented from them lately as National with the codes has been consistantly lower by $20-$40 a rental.
Sign up for the free Orlando Magicard as that will get you a 10% discount on the rental if you cannot find any other specials.