If you are a gourmet hot dog eater, you'll love Mel's. Mel has been a staple in Tampa since the 70s. He only serves the best all-beef weiners. You will find a lot of Northerners in Mel's, especially from Chicago and New York because it is so hard to find a good hot dog in the South.
Mel's is not far from Busch Gardens, almost across the street in fact, so if you are going to Busch Gardens, I would save my appetite for Mel's and eat there instead of eating awful park food. All of his hot dogs and buns are steamed, not boiled, so they aren't greasy.