Excellent little bag.  Bought it instead of the 21" for a flight to Europe, specifically for LOT's specifications.  It is an inch too wide for flights in the US, but the 15" width made it unexpectedly capacious.  It slightly exceeds the stated height, which accounts for the loss of one star.  However, should you fly business class, no one checks the dimensions or weight of your carry on.  Beware, however, of carrying scissors or cuticle nippers, they must go in your checked baggage and this info is buried on the airline's site.  This bag has exceptionally maneuverable wheels.  I will likely replace my larger, 28" for something as light and maneuverable as this bag.  Weight IS checked on the larger bag, even in business class, but the allowance is ample.  I particularly liked this bag's many zippered exterior compartments.  For economy flights,however, beware stuffing those compartments as the overhead bins are much smaller.