Pizzaiolo is a go-to place when you need a slice right now but you want something a little fancier than your Pizza Pizza. Open late and offering dozens of choices of pies by the slice, this place certainly hits the spot when you're looking for a non-PP slice in the Annex.
The staff is friendly and the service is fast, and the place is generally very spic and span. On a rare occasion you will find there is only one person working and the tables might not be cleared as promptly. Overall though, the service is good. There is even a cute collage on the wall from one of the staff member's kids about "My Daddy's Job" which describes her father's job making pizzas. Adorable.
The pizza is great, my favorite varieties are the potato-rosemary white pizza, the "Godfather" slice which is a deep dish slice featuring what seems like a hundred different types of meat, the veggie artichoke slice and of course, the capicola/gorgonzola slice, which is both spicy and tangy in one bite.
My recommendation when you go is to try something new, as there are so many slices to choose from to just stick to plain pepperoni or cheese, neither of which are super memorable there anyway. Get some crazy toppings and enjoy! I've never actually ordered a whole pie there to go, so I can't speak to their takeout/delivery service at all.