The lunch buffet is what it's all about at Ru San's, although they do offer a regular dinner service that's also good. Said buffet can be crowded, so be prepared to put your patience to the test as people forget how lines work. That's certainly not the fault of Ru San's, though. Things move pretty fast in this place and the attentive servers keep the buffet fully stocked with fresh platters.
This isn't traditional sushi and sashimi, but I love their creative approach. It tastes good and there's a fair amount of variety. If you have little to no experience with sushi, here's your introduction. My personal favorites are anything involving eel, asparagus, avocado, or tuna.
Try the cucumber salad and the fried calamari, if you go to the buffet.