The Roy Thomson Hall is a beautiful and convenient place for the Toronto Symphony Orchestra. Located in downtown between King St West and Simcoe St, it's a 5 min walk from St Andrew TTC station. The nearby parking lot also offer $10 parking for 4 hours if you want to drive. That's enough time for most concerts.
Inside, they have snacks and drinks booths on each floor. They also offer beer and wine.
There are guides on each floor and section that direct you to the correct booth, so you'd never feel lost. The sections are designed nicely to provide good views. There are plenty of leg rooms so you won't feel cramped. But the seats are not really soft and non-adjustable. If you're at the top floor, you'd have to constantly lean forward to look at the performers.
The acoustics within the theater is quite good, even if you're on the top floor. You can hear the sound clearly.
The bathrooms are also quite small, as there are always huge lines during intermissions.