My friends and I went to Rudy's Can't Fail for Sunday brunch based on a recommendation from a friend who lives in San Francisco, and we were pleased with the food. This is just a typical diner place and doesn't pretend to be anything else. Although we were there for brunch, half of us opted for the burgers, since they had some unique creations. I'd recommend the Santa Fe burger, but not the chupacabra burger (goat cheese and bacon). The breakfast items that we ordered were actually pretty tasty, though. The chicken and gravy biscuits were the best, and the chorizo & egg hash was spicy.
The atmosphere is very low-key, and it's a fine place to lounge around with a cup of coffee on a lazy Sunday morning. Obviously it's not really fine dining, but you know what you're getting yourself into. We got out of there for less than $20 a person, so it's not very expensive.