Do not book with Webjet. They are a fraudulent operation. I canncelled my wifes ticket 3 weeks prior to the flight and requested the taxes portion of the ticket. Webjet refused. Airlines will refund the tax portion if a flight is not taken as the tax is not paid to goverments until the flight is taken. As a result of Webjet refusing to refund the taxes they can pocket the money as additional profit.
Do I need Travel insurance?: Some low cost carriers offer you travel insurance by default. This insurance covers you for the duration of your flight/trip. If you already have a comprehensive health insurance policy, you are probably covered much better than you would be with the travel insurance offered by the airline. In this case, there is no point buying travel insurance together with the flight ticket.