From the outside, Sapporo does not look like what I expected to see. In fact walking in it is much larger and nicer than one would think. There is a huge drinks bar at the front and they have a great selection of Japanese beer (not just the standard Sapporo rice beer or Kirin Ichiban). As you wander in further you see to the right a big open area where teppanyaki (Japanese grills) are set up. About halfway back on the left a huge sushi bar along the wall with probably a dozen seats. My group sat at a regular (non-sushi, non-teppanyaki) table.
Probably 2/3 of the menu were various sushi rolls, so we figured we had to start there. We decided to go with the eel roll and the Thai chili roll, if only because I liked all the ingredients and didn't want something fried. Both were delicious and were huge. They ranged in price from about $6 - 15. I could easily have made a meal out of one plus some soup and miso or edamame. There really are a ton of options for rolls, and even the pickiest of eaters could find something they liked. Next time I would maybe try the $35 sushi and sashimi chef's special because it looked pretty impressive and the chef chooses what to give you. This is always a great option at a sushi restaurant because sushi chefs will often give you the freshest, top-quality fish.
When it comes to entree options I would definitely say that Sapporo is not the place to get Japanese food. They had a few teriyaki dishes - something I never once at while living in Japan - a few udon/soba options and a few tempura options. To me those are very American-friendly Japanese dishes, so I can't say I was impressed. Additionally, they were very expensive ranging from $10 - 16.
Overall I would give Sapporo 3 stars (out of 5) but I would say I probably will go back. Why? Because it's convenient and has a great atmosphere. I think I'll stick to the rolls next time and get my fill that way. For more standard Japanese fare, I think I'll keep looking.