The grommet and ring used on the top to hook on a bag came come out from the shell upon first trial when the bags were empty. They did travel well but need skid plates on the bottom rear when pulling them across slightly uneven sidewalk. I did appreciate the four wheels as opposed to just two wheels on other brands. These made moving the bags while in line at the airport much easier. You must be very delicate when zippering it up however. The zipper wants to bind and if that happens it winds up being a gamble whether or not you can get it back open without damage.