http://www.gizmag.com/glacier-skywal...-canada/32056/
Visited there 2 weekends ago and I have to say it was underwhelming. There's not much that you cannot see just by leaning over the ledge than on the glass floor.
The entire structure is rather small, smaller than it looks in photo. It doesn't cost that much, only $25 adult and $12.50 for kids but it's not worth the 6 hour round trip to go see it.
If you do the icefield bus tour together it might be kind of worth it if you got nothing better to do. But on it's own, I will say skip it until they build a Tim Hortons or McDonalds besides it.