While my mother would consider this place to be a 5-star, I find there is still some room for improvement and am giving it a 4. The ambience and food seem very authentic, and while the prices aren't cheap, I feel that the value is still very much there.
My mom raves about the lamb, so if you are a lamb lover, this is a good place to order it. I usually get the obvious choice of chicken souvlaki which is pretty good, but not the best I've ever had.
As far as Greek restaurants go in this neck of the woods, I'd say that this is the best overall. Make sure to make a reservation if you are going during peak times since real estate is small and it can get quite busy.