Great duffel for the price.  It's also a really good size for me... fits a ton of stuff.  Seems durable, too, and the zippers are great.  I've used it on airlines, on ski trips, and on 2 week vacations.  A lot of people seem to look for one that stands on it's own, and as others have said it's all about how you pack it.  If there's not much in there it won't stand, but then you just lay it on the floor... if you can't bend down to pick it up then maybe you shouldn't be toting a big duffel...?  Fully packed it sottd up just fine.

I really can't think of any negatives.  It might be a little better if it had an internal compartment or two, but I don't mind the one big compartment.