My boyfriend and I go to Ritter's probably about once or twice a week now, usually around 3AM (yes, the best time to go to a 24 hour diner). I get a grilled cheese and fries every time and he now gets the patty melt every time, though he went through a few other dishes before settling on the patty melt. The grilled cheese is good - hits the spot. I have the food palate of a 4 year old and the grilled cheese is delicious and buttery without being soppy and overly greasy. My boyfriend got the steak the first time and was horribly disappointed, but I cannot fault Ritter's for that - he always gets steak at places that proooobably don't specialize in that kind of food. It was oddly overcooked and past well done on one side, but almost rare on the other. Don't really know how they did that. The next time he got a sandwich that had turkey and some other kind of meat and it was good, but now he is totally in love with the patty melt. His apartment is right near Ritter's, which is good and bad (good for the yum and bad for the waistline) and he always wants to come and get a patty melt.
Don't go and expect to get 5-star high quality cuisine. But for what it is - a greasy spoon diner - it is very good.