You can sum up Two Bells in one word: Comfortable. Not only is the food really good, the staff is really friendly and they get in special beers all the time.
The menu is pretty standard "bar and grill" fare, with a few surprises here and there. The Ahi tuna caesar salad was the surprise that I went for, and it was very nice. My dinner companions had a turkey sandwich and a cobb salad, respectively, both of which received high praise.
There were some unique beers on the regular list. I had one off the list, and one of the specials, which was made with fresh hops; both were fantastic. Being the professional that I am I failed to write down the names of these things. My subconscious was already plotting my repeat visit.
Perhaps the main attraction, though, is the atmosphere. For Belltown it is an incredibly chill, low pressure place. It's been described as a dive, but I don't agree. But then, I've lived in Baltimore and Memphis, so it could be another case of skewed perspective. I will agree that it's about as close as you can get to a dive in Belltown. Semantics aside, it's a good place and you should go.