The Opera House is one of those nice cozy venues which really isn't all that hard to navigate. It's smallish size makes it seem intimate, but not so cramped that you cannot move. The bar and merch booths are always conveniently at the back, where you can chill out if you don't feel like getting up close and personal with the band you're checking out.
Another bonus is that the balcony area is typically readily available without having to purchase VIP tickets, meaning you can get a nice bird's eye view on the performance. A must-see for any Toronto concert-goers!