I've had the pork loin, chicken cheese katsus and they were all really delicious. If you come to mr tonkatsu, it will make it hard for you to eat katsu anywhere else because they really make it a great experience. The katsu is not oily at all, super crispy, and actually quite light - you'd get much fuller on ramen. I'd recommend trying the cheese katsus, and the salad dressing is a must on the cabbage slaw. The rice is also very moist and soft, which complements everything else very well.
Service is always really great - everyone is nice and attentive.