What an amazing experience!! We did this on impulse and definitely do not regret it all, regardless of the excessive cost. The wait time was not significant, and though we went on Memorial Day weekend it wasn't as busy as you'd expect-but then again that's a US holiday, not Canadian, so that played in our favor. I'd suggest buying or booking tickets in advance, although we lucked out, if you're keen on doing this, better safe than sorry! The entire process puts your nerves at ease, they are very thorough, professional, diligent at checking and rechecking and then doing it all over again prior to bringing you up 117+ stories and taking you outside. This was a great adrenaline rush, a superb view, a fantastic time and a very very unique experience. Would highly recommend it to anyone that loves an adventure and isnt scared of heights!