This particular star's is my favorite because they are fast and always friendly. I usually go to Sonic but have started to switch to Star's. They have huge salads in comparison to Sonic and so you definately get more bang for your buck.
The only thing that I can really complain about Star's is that all of their food is packaged in styrofoam. I am not a big save the earth person but I really don't like that each meal I buy is so much darn styrofoam. So although I may like Star's better my switch from Sonic is about styrofoam waste and thinking about all my boxes and cups sitting in a landfill....kind of makes me feel bad.