I was looking for a decent , light weight case for short hols. it is very acceptable regarding weight, size , no wasted space in interior and hopefully strength (being heaved about carousels , boots of cars and at airports) It also expands , which is useful, but not convinced it will be accepted as cabin luggage by carriers UNLESS nowhere near full, ie you can squash it very firmly into the airlines metal "measure".
The other minor issue that may be problematic is the 4 straps 2 each side , maybe those are there to minimise size to squash into airlines metal cage. Things like straps tend to get caught up on other things , and eventually get ripped off, damaging case. However for the price and size very good.