We have four of these, all of which were bought at Target, so there was no risk of receiving a less-than-perfect-condition item, as happened to one reviewer.  We've taken three of the bags on a total of eight flight segments and on and off a cruise ship.  (Cruise lines tend to be even worse than airports and airlines when it comes to treatment of luggage.)  We've also dragged them a long way, including a quarter mile to a water taxi in Venice.  The three bags still look absolutely like new.  The only mishap has been loss of a zipper tab, which disappeared between luggage pick-up on a ship and arriving at home.  My guess is that a glancing blow on a conveyor knocked it off.  The luggage has a 10 year warranty, so I expect to get a replacement tab and reattach it myself.  (Warranties may not be as good as they sound when you consider the problem of shipment.  If you bought from Amazon, you'd at least have a box.)

The bags roll and swivel well.  Spinners, as you probably know, will swivel and roll freely while standing upright.  Unlike some spinners, these bags will roll backward while tilted forward, which can be handy when going on and off elevators where there's not enough room to turn around.  This is what the ad copy means when it says "Push, pull, or turn in any direction with effortless mobility."  When on a flat, smooth surface, I can slip my Tumi roll-aboard over the American Tourister's handle and roll the AT upright.  This vastly reduces the burden on long hauls.  The bag did just fine carrying the extra weight, which probably exceeded a total of 75 pounds.

The name of the game now in air travel is to make full use of your 50-pound allowance for checked bags.  I've weighed all four of the AT 29s empty, and they come in within a tenth of a pound of 11.5 pounds.  That's about half the weight of some of our older luggage, and it's a big deal, given the 50 pound limits.  The expansion feature will allow you to get the weight up to 50 pounds, even when packing only clothing.  It's obvious that these bags were sized to reach a total weight of 50 pounds, and with heavier (denser) items, you can exceed 50 pounds without using the expansion volume.  Today's savvy traveler who is pushed against the weight limit will put his heavy (high-density) stuff in carry-on bags, which currently have limits on dimensions but not on weight.  Under such conditions, many will use a roll-aboard  and a back pack (or in my wife's case, a large pocketbook) along with a single checked bag.  On a full plane, you won't be allowed to put two carry-ons in the overhead, so one will have to go under the seat.  If the backpack is fairly small, it can fit under the seat without totally constricting leg movement on long flights.  If you use this trick to handle your heavy (dense) items, you'll likely be able to make full use of the expansion feature without going over 50 pounds.  A disadvantage of the expansion feature is that your clothes will be compressed when the bags are stacked.  The expansion goes outside of the basic frame.  I prefer to keep the expansion volume zipped down when possible.

So far I'm extremely pleased with this luggage.  If I have problems later, I'll update this review.

***Update*** I've now had four of these for another year.  They've been overseas again and on another cruise ship as well as several CONUS trips.  I wouldn't trade them for anything out there.

PS:  If you're concerned about weight, you MUST buy one of the little portable luggage scales.  If we lost ours, we'd be in big trouble.