So I'm slowly catching up on the reviews of a trip that was, at this point, about 3 months ago. But…read morepresuming nothing's changed in 3 months, they had a bunch of great flavors of pizza by the slice, 4-5 euros a slice. That's already not bad, but their slices were... large. We split 4 different slices, but asked them to cut them all in half, which they did. That was... too much food (we ended up eating some for an unexpected pizza breakfast the next morning.) Great pizza, great sauce, great fluffy crust. The flavors we tried - mozzarella and basil (fantastic), pork belly (basically bacon, but very good bacon - fantastic), one other one I didn't appear to have written down, and the mushroom and truffle that we both agreed was certainly mushroomy, but a bit one dimensional. Would definitely come back if we were in Lisbon in the future.
It is basically only to-go, which was fine for us, we were staying at a hotel nearby. The do also sell fancy sodas and a great Italian craft beer for, at least as of a little under 3 months ago, 3 euros each, which we also got one of each (also great, especially when you're on vacation and you don't have access to your beer collection like at home. :D)