I've tried hummus and falafel at just about every place i can find that has it and Sababa's is EASILY the best. Well, the falafel has a competitor in a place in CA i had once, but the hummus is seriously the best of the best of the best.
Other than those, I think the only other thing I have tried is the beef kabobs... Pretty expensive, but also one of the best ever and well worth it.
My only complaint with the place is the ordering/eating/paying system - especially when it's busy. That's the order - order first at the counter (which can be a little chaotic), then go sit and eat at a table, then pay at the register.
So the flow is a little awkward, but not enough to give it less than 5 stars for the best hummus, falafel, and kabobs, i've ever had on a consistent basis for the 4+ years we've been going there.