We wanted to visit Toronto but decided to get a hotel room in Burlington - it was cheaper and the location was perfect for exploring, so we would commute into Toronto every day. We did have a rental car but everybody said not to try and drive in.  That was some very good advice, the road construction was everywhere. The best way to get in to Toronto from surrounding areas is the Go Train.  It is amazing how honest everyone is. There are no ticket scanners or gates to go through. You just put the ticket in your pocket in case they ever want to see it. We rode the train 4 times and showed our ticket once... The Go Train is a wonderfully comfortable means of transportation, just sit back and enjoy the ride.