If you're ever stuck overnight at Toronto Pearson this is a great place to stay - very clean and modern, a refreshing change from regular, boring hotels - everything about this place is interesting.
They have a nice bar in the middle of the lobby and lots of quick food options. The staff were also extremely helpful and friendly when I arrived at 1AM. The room I was in was a bit small, but for the few hours of sleep I was there for I wasn't complaining.
I would check this place out before the Sheraton or other airport hotel!