A very unique experience. It's expensive, but it's a truly beautiful creation. My partner and I stayed there with a 2-night package - one night in the ice hotel and the other at the lodge and we felt it was well worth it. The package allowed us to use the facilities as well, to cross country ski, hike, sled, etc. The service was terrific, the staff help you get prepared for your night and they even brought hot chocolate to our room in the morning.
It's a a unique and fun way to enjoy our Canadian winters!
If you don't want to spend the night, you can buy a day pass just to go in and look around.