It depends on what you are taking with you. If you travel with kids it is perfect. The dividers make room for small thing you need to keep close. Sizewise it doesn't quite fit under your seat, but it does sit well by your feet if you don't want it in the overhead compartment. If you need to have necessities like medication with you, the middle zipped compartment is perfect for that, as well as for tickets /passport. It is my experiance when flying that I don't have that much time or space to ramble through a large bag to find stuff. It needs to be easy to locate and separate enough to not make a mess. This bag holds alot, so small tax free purchases like perfume etc fit perfectly. It also have room for inflating pillow, a book, head phones, minicharger etc, so all in all it is a good companion for a fight!