Sushi Mountain is in a plaza on Kingston Road and Westney - the sign is really big so it's easy to find.
We walked in and were taken to a table. It's quite spacious inside, tons of room. The decor is modern and the restaurant itself is clean. Would probably be a good place for groups.
You order off a menu and you write how much of each item you want on a form. Much more efficient than other places where you list off your 20 items to your server. The menu has a good amount of variety in rolls and types of food you can get. The food came fairly quickly and there was always something on the table. At some places I've been to food can take a while to arrive and you end up waiting for more.
The star of the show was definitely the sashimi. I wasn't expecting much from an ayce but I definitely wasn't expecting the sashimi to be the best item of the meal. The sashimi were cut into thick pieces and very flavorful. You could see the white bands of fat very clearly in the salmon. My friends were surprised at how much I ate.
The rolls were good as well - some are pretty big! The hot items were good as well though we didn't get too much. The tempura was fresh and had a good batter to shrimp ratio. Surprisingly the ice cream was also one of the highlights. We had the red bean and green tea - the matcha taste was rich and the red bean was sweet and light. It was on the creamier rather than the icy side.
Price for dinner is about $24. Not a bad price for ayce - the GTA is generally a bit more expensive for similar quality. Had a great experience overall and I would come back.