Pini's is good, but when I got tired of them, I switched to Cristo's and I like them very much also. I've only tried Eat at Jumbo's once. I liked it, but my kids didn't, so it's off our list, alas.
You may be interested in this post from 2008 (http://davis-square.livejournal.com/1253726.html) in which DSLJ members were polled on their favorite local pizza places. Of course, lots of places have closed and opened in that time, but still.
Do any of the local pizza places do standard Italian pizza well? So many of the local places are actually Greek. Angelina's did well for us for a while, but then they started getting inconsistent. I haven't found a new favorite yet.
After trying a bunch of places, I've now settled on Caprese Pizza, which is on Medford Street in Magoun Square. My second go-to place would be Pranzi's over on Winthrop Street in Medford.
Now that you mention it, Cristo's does charge an extra dollar for delivery, but honestly that doesn't bother me. If it were much more than that, I might be more inclined to care.
I'm a fan of City Slickers. The pizza is kind of on the greasy side, but the crust is crispy and delicious, and they have a lot of excellent topping options, including goat cheese.
They don't delivery, but if you happen to be in close-ish walking distance of Pescatore, in Ball Square, I am a big fan - plain pizza satisfies picky kids, toppinged pizza make me think of what you might get for "fast food" when traveling in a tourist town in Italy or along the Adriatic.
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