I bought this to use at the gym and it's been working out great. The front pocket holds comb, hairspray, earbuds, gym pass and keys.  The middle pocket holds gym shoes, swimsuit and change of clothes.  I love the height of the telescoping handle and it rolls with ease.  It fits into the gym lockers easily, so I would think it would fit under an airline seat. I have no complaints with the quality either-- it seems very well made.  For the price you can't beat it.