I fly to work each week, so I require a sturdy, spacious carryon suitcase that can hold a couple of suits.  With some care, I am able to pack two suits, several sets of gym clothes, 4-5 dress shirts, 4-5 neckties, 2 additional pairs of pants, 1-2 extra casual shirts, socks & underwear, 1 pair of dress shoes, 1 pair of casual shoes, 1 pair of gym shoes, 3 oz toiletries, and a couple extra gym items.  It all fits snugly, and I can still fit it into the overhead compartment of any Delta airplane in which I've ridden, other than a Canadair Regional Jet.
Handles and wheels are sturdy, and it looks nice.  It also includes a removable, external hook for carrying an additional bag through the airport, and a combination lock.  The only reason I don't rate it 5 stars is because I never rate anything as perfect.