I dunno what Maundie is talking about, In n Out is fantastic, I'd never dream of comparing it to McDonalds. I'm sure most would agree too. Double Double, animal style is what you want.
Wasn't just me the missus left hers, we had McDonald's in Vegas and it was much nicer than In N Out in my opinion.
Have one and make up your own mind but I definitely won't be having another when we go back to San Fran.