My wife and I did a half day trip on the ice breaker in March 2012. It was great fun!
You get shown around the ship, including the engine room, bridge and captains lounge. You get a simple lunch included in the price - we had chowder, which was very nice. I think you can pay extra for a bigger lunch if you want one. You do, of course, get to see the ship cut through ice. But the highlight was where you put on exposure suits (over your normal clothes) and go into the icy water! Amazingly, you don’t get cold, and you don’t get wet. It’s quite a unique experience.