Ad Astra is a speculative fiction convention in the outskirts of Toronto (specifically Markham) that I’ve attended now for several years. (2012 and 2009 recaps). Last year they moved to a new hotel for the convention, and it looks like they’ve started to fix some of the problems with last year’s event.
There were fewer tracks of programming this year, which was helpful. This reduced the heavy load on the elevators from last year, and made panel decisions easier.
Panels scheduled in the smaller rooms on the lower level were a real problem for me, as the rooms seem designed to devour sound. There are no microphones or speakers, and the panelists tend to be soft spoken. I had to bail on one panel because the sounds of people in the hall were far louder than the people at the front of the room.