Just bought one for £85 a few weeks ago and used it for a short trip (10 days) overseas. You can fit a lot in it, but it was acceptable as hand luggage (on Jet 2). Lots of useful pockets and the straps can all be tidied away when needed. It's a very good bag.
67£ @ gooutdoors.co.uk using the code "WEL116" and a membership card. (might benefit some) Great backpack by the way!
Great bag, the 55l version is the prime size IMO ...
Great bag, super comfortable to wear and well put together.
Travelled the world with this bag and it was excellent. Highly recommend. Packing cubes and the waterproof cover are good to have also.