I have eaten here probably 50+ times in the past decade and it is one of my favorite places to eat when I need a quick, tasty meal. The servers are fantastic. The occasional less-than-fantastic server is not around long, and many have been there for years. The manager often walks around to see how everyone is doing, always with a smile on his face. They do very well with my often-complicated order (I'm picky) and never make me feel like I'm burdening them by asking for things a little differently than how they have them on the menu. It is sad to see that few Friendly's are still around but there is a reason this is one of them.
The only reason I deducted a star is because the bathrooms are always a bit icky and the floors often seem unclean. If the owner(s) update the bathroom (maybe even making it a multiple-person one) and make it easier to clean, I would gladly give that fifth star back.
Food is consistently good and cooked well, service is great, and I always leave happy.