First Reviews: Matt Damon in 'The Martian'
Several reviews in one article
Some years an unknown, or at least underanticipated, move busts out of the gate at Toronto and becomes the talk of the town before the first weekend's over. That hasn't happened so far this year, but the festival does seem to have one across-the-board hit: "The Martian." Based on Andy Weir's novel about an American astronaut's attempts to survive on the barren surface of Mars, Ridley Scott's movie is a solid, up-the-middle crowdpleaser — and, if the buzz around Toronto is any indication, a major hit in the making.
http://blogs.indiewire.com/criticwire/first-reviews-matt-damon-in-the-martian-20150914