I love Choshimaru, too. There's one near my house and I'm frequent there.

Yes,they have conveyer belt but you can order whatever you want and chef behind the counter will serve sushi for you. You can even order the sushi exist on the conveyer belt.
They have some seasonal specialties, too.

Different from the cheapest conveyer belt sushi, the whole sushi is cooked by chef not by machine. Only exception is the rice for "Gunkan-maki" which (I think) shaped by machine.

+1