I don't think I can top Kate's review, but I wanted to say "here here!" and add my five stars.
This place provides an incredible and invaluable service to Torontonians of all walks of life. I think I was expecting it to be sketchy or low-rent or something, but the facilities are bright and clean, there's lots of informative pamphlets, helpful and friendly staff, free condoms and lube, and testing is completely free!
This place, out of any venue in Toronto, is absolutely the most-deserving of a five star rating.
Tell your friends.
ALSO, VERY IMPORTANT: Womens' hours are Trans hours, too!
http://www.hasslefreeclinic.org/DirectoryWomen.php