This case replace one that was supposed to withstand some beating but did not. I have now taken this Kenneth Cole case on three trips (total of eight flights).  This was my first carryon to have four-way wheels, and what a huge difference that makes when moving through long security lines.  It glides well in all directions.  The outer shell seems impervious to scratches.  The case is a tiny bit shorter than my old ones, and this has made a huge difference in terms of fitting snugly into the overhead compartments.  Finally, I was not sure I'd like the fact that one side has a fully zipped closure -- now I LOVE that aspect of it.  I am able to pack that side remarkably full and tight because it's like a suitcase within a suitcase.  When traveling w/ carryon only, I used to have to juggle the bag carefully when removing my baggie o' liquids, so nothing else fell out.  The fully zipped compartment means that everything on that side is secured, so when I open the shell to slip out or re-pack liquids/PC, etc, I no longer have to deal w/ slippage or things moving around.  (this was not why I bought the bag, but it's been a pleasant bonus).  Best of all, it is light and flexible -- while it is a 'hard' shell, I am able to get some flexibility from the sides, plus the zipper band has some stretch to it that allows for returning with extra "stuff" a bit easier.  I highly recommend this piece.