Came here during the winter to go skating with some friends. They have a rental spot if you don't have skates which is pretty convenient and its not expensive at all to rent. We went skating for a couple hours on a Friday night and it wasn't overly busy which was nice. We had some space to move and actually skate unlike some outdoor arenas...in say downtown core Toronto. The ice was well maintained and there was plenty of spots to sit down and relax/chat.
I am looking forward to seeing what celebration square has to offer as the weather gets warmer!