This product is an excellent value $79.99 for five pieces, if you are traveling by car. I went to Disney World a week ago by plane and had to go from O'Hare to Atlantic City New Jersey, then to Orlando, and the metal handle to the carry on that goes overhead bins, second to the smallest, broke when I attached the smaller carrier on to it using the strap. Granted, I had my laptop, and camcorder in the smallest bag so there was more weight than what it could handle.
The largest travel bag held up on the way there, but on the way back ripped when we came back and arrived at O'Hare. Overall, I used three pieces and out of the three, two broke. The really small bag that went under my seat did not break. That being said, my mom bought the exact set from Wal-Mart and her luggage did not break at all.
My recommendation would be to use this luggage for traveling by car, not through airports. The materials are not made to hold up having bags dropped on it like some of the material. Overall though for $80 it is a great buy and if you like to travel by car offers a lot of luggage at a low price.