Let me start by saying that I frequent Humble Pie quite often for their lunch special. It's affordable and I LOVE their pizza.
However, my friend and I always sit at the bar and are served by the owner of the restaurant who continues to ask us if we've been in before. He's served us at least ten times. I'm fine with not being remembered, but the thing that continues to irritate me is that he is extremely rude and short with us. The servers there are great, but since we are usually in a hurry we'll sit at the bar. For someone who owns a restaurant, he is surprisingly adverse to positive interactions with his customers.
2 stars for the great food, but the horrible experiences at the bar are a turn off. I'll still go there and put up with it, but I would advise anyone to sit at a table and not have to tip someone who treats them unkindly.