A few things you should know about this review.
1) I am from the NY/NJ area and have been skating at Rockefeller Center (ok, not skating per se but going there) since I was in diapers.
2) I am skeptical when a big machine like the Cosmo puts up an attraction essentially for kids as the Casino is not the best place for kids.
That said, I really enjoyed this place for the following reasons.
1) it is only 10 dollars for locals and 15 for visitors. This is not unreasonable given the demand and the size of the rink.
2) At the bar they have a chef making gourmet hotdogs, pierogies, grilled cheese etc and the food is good and really not that expensive ($20.00 for two entrees and a hot chocolate).
3) Although the rink is on the small side, there seemed to be enough room for everyone and they have those plastic seals to help the bad skaters get around. A few people took tumbles and paramedics were nearby to lend a hand even though I doubt there was any serious injuries.
4) The staff is super friendly and there are foosball tables around the center.
5) Even the fire pit reservations are not outrageous. For 4 people there is a $200.00 food and drink minimum and you get marshmallows to toast over the fire pit. We didn't partake but It could have been a lot worse.
6) There is a sports lounge area right by the rink with couches to watch the games.
So this place rocks. The rink is too tiny and there isn't enough seating for the parents but other than that, Kudos to Cosmo for pulling this off right.