CN Tower was great! I must admit that looking down the glass floor is a bit intimidating! I couldn't get myself to even walk on it, but around it!
I never made it to the 360 restaurant as it requires RESERVATIONS. I was told, however, that if you do go to the 360 restaurant, along with your meal, access to the tower and glass floor is free. So, if you want a meal and a free ride up, this is something to consider. I would check out other reviews to determine if the food is good prior to going...that is if you care.
Also, I noticed that a new attraction for this year is the Edge Walk. If you're into thrills, it may be an option for you.