When I found out the Germain Hotel group had a hotel at the airport designed for travellers on layovers or those with early flights to catch- I was immediately on board to try it out for my next trip. I was headed to Africa and had a very early morning flight, so I decided to stay at the Alt Hotel. The rates are really good, the beds are absolutely to-die-for (like sleeping on a cloud) and it has everything that you could possibly want, and none of the extra frills you don't need at an airport hotel.
I highly recommend this place for anyone travelling through Toronto Pearson.