This is my favorite place to eat in Santiago. The atmosphere isn't spectacular, but the sushi is to die for. Monday to Saturday after 8pm, the menu is half-price, and delicious sushi rolls filled with fresh fish and wrapped in avocado or salmon are only $2 for eight pieces.
The staff is nice. I left my expensive camera there once, and they locked it up for me and had it waiting when I came back the next day. It's directly across from the movie theater Cine Hoyts, so it's a good place to go before a movie.