Just got back from my vacation, and am delighted that my new bag held up great!  The size is just perfect for a carry-on, but the inside is super roomy!  There are a lot of small extra pockets, which makes it easy to keep your smaller items safe and organized. The wheels roll smoothly in every direction, and the outer shell is durable.

I was able to fit 5 shirts, 2 pairs of pants, sandals, a travel hairdryer, all of my socks,etc. and quite a few incidental items, and still had room left over.  I do laundry while on vacation to save space in my luggage, but I could have brought a LOT more stuff and still had room.

The only problem I had was the handle seemed to retract quite often as I was walking through the airport.  Either the button is super sensitive, or the locking mechanism doesn't latch completely.  This was a minor annoyance, but didn't affect the overall usefulness of the bag.

EDIT: 2/26/2013
After a solid year and over 15 flights and car trips later, this bag is still doing it's job!  It has a few scuffs on it from heavy use, but I still love it.  The extending handle is starting to stick a bit, so that is something to keep an eye on, but otherwise I still intend to use it for a long time.