I've been to this out-door restaurant once, and from what I remember it was pretty good. I haven't seen any customers for this place for a long time though. When I just went to Disneyland last month I saw they put in some new Home On the Range theme into it but I didn't see anybody going in there.
Well, I hope it's still there for my vacation in November... That back walkway from Frontierland to Fantasyland is one of my favorite areas of the park.