This place tries to make Chicago style pizza, and I only really ding it because its not even close...but, the pizza there is still pretty good.
If you are from this area, I would say its some of the best Seattle has to offer. Another place I recently have gone to and really liked was Northlake Pizza. These two places give you both sides of the pizza world. (from Seattle's perspective)
If you want to come here, prepare for a possible wait, its a small, cramped restaurant. If the patio is open, its definitely easier...
The owner/manager (at least I think he is one of them) is always very polite and accomodating as well. Check it out for some good pizza.