Service at Gyu San is friendly, efficient, and chirpy. The relatively young service staff offer recommendations, though the menu is small and focused, but they're able to describe each dish. They proactively top up water glasses, and offer to remove finished plates; I also note they clean up quickly when guests leave. Order fulfillment has a short wait.
Gyu San is your one-stop haven for Japanese prime beef served at its finest, in its finest.