Although these seats are on the sidelines, they're not all that great. You can't make out any of the players and will have no idea who is on the ice. The crazy hockey atmosphere can easily make you forget how good or bad your seats are. The 400s are small sections with only four rows to a section so you're automatically going to be in the last few rows in the arena when you purchase 400 level tickets.
They're the cheapest at the Bell Centre and for good reason.