Went to Santarpio's for the first time yesterday - we arrived at 6:00 and had to wait about 20 mins for a table. Once inside, our table was large and service was pretty friendly. Menu is simple, so ordering wasn't too difficult.
We had two pizzas - one olive, and one garlic/sausage. Both were excellent. I forgot to order them 'well-done' but they ended up coming out pretty well-done anyway. Crust was very crispy on the edge, and didn't get soggy in the middle. I remember reading that the crust here is kind of crumbly, and this is a good description. One of my dining companions commented that it was really unlike any pizza she's had before, anywhere, in terms of crust. The tomato sauce was somewhat heavy handed (especially compared to, say, places in New Haven), but I liked the flavor. Garlic and sausage pizza was my favorite, but the olive one was good too.
We also had an order of lamb and an order of sausage. Both were great, and were served with large slices of bread and some hot peppers. Like others have noted, the bread is unsalted, and also had a somewhat crumbly texture, but I really liked it. The lamb tasted like something my dad would grill (in a good way), and the sausage was nice and peppery.
Santarpio's is some of the best pizza I've in the Boston area. It's not the same (or as good, in my opinion) as pizza in New Haven, although the interior of the place reminded me of Modern A Pizza in New Haven - that old-school feeling. I do think a trip to Santarpio's is great for a quintessential Boston experience - definitely gives you a taste of Eastie, and provides a unique dining experience that can't be had elsewhere in the world.
All of us were happy with the meal, and thought it was worth the trip and worth the wait. So, a good night had by all!
P.S. After dinner, we headed to Central Sq to Toscanini's. Sampled lots of flavors. Things I loved: Earl Grey, White Coffee. Things I liked OK: Wort, Goat Cheese Brownie. Things I didn't really like: Coconut sorbet (didn't have much flavor somehow), Blackberry (something about it tasted too lemony, even though I realize it may not have contained lemon), Brown Butter-Burnt Sugar-Brownie (it was way too sweet, although one bite was okay)