EDIT
Issues I encountered on the day regarding fare discrepancies were isolated and outside of the control of Adioso, and are likely to be a thing of the past, as of changes being made to the site in the next few days or so.
By all means, DO use Adioso - it's by far the best tool we have for beating the airlines at their pricing games.
Original post:
What a waste of time (and money) it is using this site. Going by the prices given, I decided on a return trip to Cairns in September which involves one stop over. The trip to and from Brisbane is only serviced by Qantas, and then the flight between there and Cairns was to have been Jetstar on the trip up and then qantas on the return trip.
So, with the way their system is set up, you have to book each leg individually, meaning that even if your entire trip is with the one airline you get slugged a cc processing fee by the airline for EACH leg, not the entire journey. The same multiplication of charges would no doubt apply if you're paying for the airline's travel insurance, seat selection, or baggage allowance if applicable, etc.
I realised this at the jetstar site, butdecided to go ahead with the booking anyway via adioso, as the prices seemed good - booked the jetstar leg of the forward journey, then returned to deal with the qantas part of it, only to find once I'd been forwarded to qantas from adioso, that the fare given on adioso simply didn't exist, and the minimum was double what they stated.
Yes, they have a disclaimer when leaving their page that the airlines might alter prices etc etc, but this variation in cost is the difference between a trip that is vaguely affordable for me, compared to one that is not really, at this point in time, yet I am now stuck with a non-refundable trip on Jetstar if I were to decide not to proceed with the significantly higher qantas fares in mind.
The site might be ok to find the times when cheaper fares are a possiblilty, but don't count on it being accurate, and don't waste time and money unnecessarily booking through it - the extra fees simply don't make it worthwhile.
Add to this the fact that the qantas site has been having difficulties several hours and it really makes we wish I wasn't booking flights anywhere today.