Ordered this for moving to Germany for 10 months as I wanted cabin luggage that could also be used as a backpack when pulling various other suitcases. Was worried it wouldn't fit the airport regulations but it fits in that little size checker box fine, even when it's very full (I flew with Lufthansa but sure it will be fine for other airlines like Ryanair). It works brilliantly as a backpack, as the back section unzips and fastens underneath to cushion you from the wheels. It works equally well as a wheeled case; the handle (which can be zipped up and hidden in backpack mode) and wheels are sturdy and it's such a useful size that I can even use it for carrying food shopping. There are also loads of different compartments, with places to put valuables. The straps round the side can be tightened to prevent things rattling around if it's not so full, which I did to stop my 17 inch laptop (which fit in great, with loads of rooms spare) moving around. Can't really fault this product; perfect if you want a versatile cabin luggage case and want to make the most of the free luggage allowance; and because it's also much lighter than other same sized cases (around 1 1/2 kilos) you can make the most of the weight allowance too. Will definitely be using it on many occasions, well worth the money!