Fan-ta-stic. Not mind-blowingly amazing, but of the few places I've tried in SF so far, these folks are hands-down the best I've had. Came here with a few friends the other week, and squished our way in to the far end of the counter, where we ordered their various katsus, and a side of tempura onion rings to share.
I myself got the chicken katsu with their hottest curry, which had a good kick, but was, in my book, more of a medium than hot (which seems to be the case with most spicy food in these parts). The chicken itself was fried perfectly, and together with curry, had some great flavor. And oh man, those onion rings! Despite being more than full, they were tasty enough that I went and finished the entire order, after my two friends had only taken one each.
Oh, and they take cards now!
Venue - A tiny, narrow restaurant, with limited seating capacity, so, while accessibility is not impossible, if the place is full (which it usually is), you may have trouble maneuvering through the hallway.
Bathroom - Didn't check them out, but I think they may have been up a step or two.
GooglePlace - June 2016