If you're not very hard on luggage, it's probably fine. My husband had a Samsonite checked spinner that we bought from TJ Maxx and it got destroyed in 2 trips. I took it to my trusty luggage repair guy (who does Samsonite warranty work) and he said that Samsonite makes special cheaper lines for sale at Marshalls, Ross & TJ Maxx. He said that if you want Samsonite, you should buy it from a luggage retailer or a Macy's, etc. He also said that Tumi & Victorinox are safe to buy from Marshalls & TJ Maxx because they are closeouts, not cheaper made lines.

Again, if you're using it as a carry-on, you've got more control than with checked luggage, and you're probably fine.