Oddly enough, we struggle more with CS options in the studios than any other park.
Backlot Express is good, basic fare. Beyond that, it's a toss-up, although I was thoroughly underwhelmed with the ABC Commissary on our last visit. Could've simply been a horrifically off day, though. (But it seems that TS establishments would be more prone to off days ... I just keep picturing that gray, spongy meat patty on DW's burger...)