I grew up in Trenton and have eaten at Mastoris many times, including holiday dinners. One place where I worked even had Mastoris cater its company picnic every summer because everyone loves the cheese and cinnamon breads there so much. Strange picnic food, but we had all the standard fare, too. Mastoris invites big loyalty from locals which should tell you something about how good it is. I've always thought their success lies in their doing so many different things so well. You pretty much can't go wrong there. Yes it's diner food, but it's really good, portions are more than plentiful and prices are very reasonable. I'm a thousand miles away from it now but boy would I love a big Mastoris breakfast, starting with coffee and those wonderful breads!
Oh and their desserts are to die for. Often that towering stuff in the diner dessert case looks way better than it proves to be when you order it. But Mastoris' stuff is really yummy. No I am not related to the Mastoris family! Just know its a great roadfood place.