I bought it for a long trip to Europe and found it roomy enough to keep my medication, tablet, extra shoes, clothes and  some food for the road while fitting steady on the top of my carry on bag (thanks to the blue pocket you can see on the picture). I had no problem to present it as my personal item (laptop bag) during check in process for BA, AerLingus and some other european airlines. On the plane, it went under the front seat. Two months it helped me on the road - zipper did not brake, handles were intact. But on the last leg of my journey, one of the seems on the top broke and now it's probably less expensive to buy  another one than take it to the shop for repair. I gave it 3 stars for the concept/ design and very lightweight material in combination with the lost price possible.