Hi Shine: Wouldn't that be the same as booking with Air Canada, CanJet or WestJet? You're going to be paying with a credit card, so you should have some security there. Also, check out their cancelation or change policy. Probably similiar to the other airlines.
I've booked with AC, WestJet and Jetsgo online and never had a problem with any of them. As luck would have it, the flight I was booked on when Jetsgo went Jetsgone, was a WestJet flight. Phew.