So, when NWA put a forklift through your PNS, what'd you do? You had to get a loaner, or did the Purdy Neat heal itself? If so, that is 'purdy neat'!
With my Costco bag, I just go to Costco, get a new one. I've got 6 returns so far - I replace mine once ever 2 years, never an issue with my Costco. No need to worry about a loaner, or time to replace - I got a new bag. Scuff marks - time for a new bag. A ramper throws it off a jetway set for a 74 in Korea- time for a new bag (yes, seriously). Wheel squeaks - you guessed it, new bag! I keep the receipt in the bag, under the liner so I can always go to any Costco to change it, any time I want, anywhere in the US.
I will say the Costco bags aren't as good as they used to be. Metal pull tabs are now plastic, and the latest one has a plastic 'auto-expander', which is silly, but not an issue for a regional guy b/c you never expand your bag, making it too big to qualify for carry-on status. The hangers that come in the garmet bag (garmet bag?! Oh, yeah, that's included, with 3 hangers, and a 'dry bag' for dirty laundry or swimsuits or whatever too!) are now plastic hooked, rather than metal, but since I have 18 of the darn things, it's no big deal
).
All that jazz you can do with the PNS (chair, ottoman, julian fries, whatever) you can do with the Costco too, but the best part is when you're done parading around your bag like a show pony, you can lift the bag into an overhead b/c it doesn't weigh as much as that show pony. If you plan to ever fly cargo, that kind of stuff is important, since you have to actually carry your bag up the stairs, and there's a lot of stairs on a 74, particularly when you got to go to the upper deck (both as the pilot, and as a passenger when you are positioned in business class to asia).
I gotta' say the PNS bag does do one thing the Costco bag can't do - ever see it go head to head with a lower lobe cargo door? Since it's all metal (the bag, though the door is too), its amazing, it turns into a freakin' pretzel, as does the owners face as they try to perform surgery and unravel their new $250 origami sculpture.