During the winter, I basically crave hotpot all the time. I was super excited when Hot Pot on Yonge opened because it's within walking distance of home.
Atmosphere: Maybe it's due to how cold Toronto's been this year, but they are always busy. Hotpot does involve open pots of boiling water so the restaurant has a tendency to steam up. Your clothes and hair will smell like hotpot after. There are large tables to accommodate bigger groups and they take reservations. I usually speak Mandarin to the servers as I find it's easier to communicate.
Service: Each time I've been it's super hectic and the servers always seems overworked. Everything manages to get to the table quickly though and the correct order.
Food: The selection is pretty standard, a lot of fish balls, vegetables, lamb, beef slices and a seafood option that includes 1/2 lobster. The serving size of each order is reasonable and you don't have to worry about ordering too much at a time or not enough. The menu is AYCE and comes in Chinese and English. All in all, it's a good hotpot restaurant and is on par with the ones uptown.