So much fun! I went with my family (4 people total) and we really enjoyed ourselves. Thing to note... The line was pretty long when we went (~ 2 weeks ago) and it was freezing! Thankfully we didn't pay for unlimited. It would have been too cold and taken too long waiting to go again.
Make sure to bundle up and wear good gloves. You MUST wear gloves in order to participate so if you don't come prepared you will have to buy a pair at the ticket office. I had on a thick pair of North Face gloves that were actually damaged due to the friction between my hand and the sled/rope. I ended up with two holes in my new gloves and a scrape on my hand.
Other than that... It was a great experience! I had a great time and would definitely do it again!