We really like Kaffee Haus, and even though I had a bad feeling about wait times, we tried to go on Sunday morning around 10am. There were already 20+ people waiting outside and we were told the wait was over an hour. I think from now on, unless they expand we will only try to go on a "down day" like Tuesday or Wednesday. Anyway, my wife suggested Rosy's which we had seen many times but never tried. We now wonder why we waited so long. It was bustling with both gringos and locals, and even though it was busy we immediately got a table. We got a couple omelettes and some chilaquiles and everything was great- big portions and piping hot. At least from this experience, I would highly recommend for breakfast.