Brian D.
Yelp
Full Disclosure: I'm a rabid Boston College Hockey Fan, and old enough to have passionately loved the Old Boston Garden. That having been said, Harvard University's Bright Hockey Center is the best place I've ever been to watch a hockey game.
Nothing fancy. No major technology (you won't find yourself constantly looking at a Jumbotron instead of the game). Kind of a limited snack bar (but they make excellent hot chocolate). This is still a great hockey experience. No matter where you sit you're right on top of the action. Clear views of the entire ice surface, passionate fans who aren't obnoxious about it (unless you're the other team's goalie), and a great pep band. This is the full, old school hockey experience.
Granted, the parking isn't great, and public transport getting there is just okay. But you'll be surrounded by good people who love good hockey, as well as photos of Harvard Hockey teams dating back a century. The prices are comparable to other college hockey experiences in the area, but the atmosphere is worth paying extra for.