Dewey's is one of my favorite pizza places. It's definitely one of the best in Cleveland.
I have never eaten anything at Dewey's that I didn't like (salad, pizza, calzones, and dessert). The staff is extremely attentive, but never annoying. I feel like this is also the least greasy pizza I've ever had, which I really like. The crust is excellent and it never gets gross or soggy from grease. Most importantly, it reheats really well at home!
The waiting area gets cramped because it's a pretty popular place on the weekend, but there are big windows allowing you to watch the kitchen at work, making the wait more bearable.
I consider Dewey's to be more of a gourmet pizza restaurant though; if you want an authentic and/or Italian experience you should look elsewhere. This also isn't the most inexpensive pizza around, not that the prices are unreasonable. The cost does prevent me from eating here more often, but I still highly recommend Dewey's.