My Big Fat Greek Restaraunt isn't the most authentic Greek place (or the cheapest) but the portions are extremely filling. The main dining area is small, though cozy during slower hours.
The service has always been very polite and professional. The servers are knowledgeable about their menu and willing to recommend different items on the menu, depending on what you like. The food ranges from Greek and Greek fusion to stuff that isn't really Greek at all so even people with narrower tastes should be able to find something they like.
Some entries are a bit pricey but the portions are large and tend to be very filling. On this trip I got th Aegean Club Sandwich, which was a very satisfying fusion between a gyro and a club sandwich. A great restaraunt for casual groups, Big Fat Greek Restaraunt's chief drawback seems to be that it might not be the best restaraunt for an intimate meal, particularly if you are looking for more authentic Greek cuisine.