Check-in after hours took about 20 min, but was straightforward. I suspect it would have been quick had I arrived during office hours.
The instructions for buying parking I received ahead of time didn't work. However, there was a QR code to scan at the check-in desk that worked fine, even after hours.
The fitness centre is the Mount Royal University Recreation Centre. It cost me $13 for the day, after the discount for staying in the residences. Fantastic facility - full gym, pool, even a rock wall (though I'm not sure if you can get certified to use it in a couple days - I didn't check). Bring a lock and a towel.
The Wi-Fi was super-fast - at least as good as I get at home.