Neopolitan pizza is not like other pizza, so Mercurio's food will not suit everyone. That being said, the pizza tastes exactly as Neopolitan ought to--chewy in the middle and browned /crispy on the crust. It's light on the cheese and toppings, so it tastes much healthier than other pizza.
I've had the Fungi, Primavera, Prosciutto, and Regina(?)/Bufalo mozzarella pizzas, and my clear favorite is the Regina/Bufalo mozzarella pizza. Given how delicate and flavorful the Bufalo is, I agree with another reviewer that it would be nice if they allowed you to switch the house-made mozzarella with the Bufalo on other pizzas. The simplicity--while usually delightful--can occasionally translate into blandness; for that reason, I like Il Pizzaiolo slightly more-- it has more options. Another thing that makes Mercurio's feel authentically Italian is the reasonably priced and tasty glasses of house wine.
I have to mention the Caprese and Prosciutto Paninis-- these are so big, filling, and flavorful, with gooey mozzarella and balsamic vinegar! They come with a side salad or soup, so this is almost the better option if you're really hungry and wanting some melty comfort food.
Given that the restuarant has a popular gelato shop right in the middle of it, it's more of a lunch or a casual dinner place--don't go expecting an intimate, romantic setting. If the hubbub bothers you, you can always wait a few minutes extra/ request a table in the back section away from the gelato line. And Yeah; Dulce de Leche gelato is sooo delicious.
The more I have Mercurio's pizzas, the more I crave them. I'm definitely trying the Pizza del Re next time.