No one enjoys sitting in the top level corners of any arena but I already knew that Bell Centre was the largest NHL arena and didn't know why I thought the views would have been serviceable from the 400s.
Plan on sitting behind the next in the 300s next game I attend this season (more than likely when the Leafs come to town).

I suppose if you buy enough $10 Molson beers, you could begin to not mind sitting this high in the upper arena. The most depressing part of my experience was that I spent close to $100 on my ticket.