i received this set as a gift from my husband...all seemed well until airplane use...mild travel car use was fine and i enjoyed the sizes and functionality...unfortunately, even though we were flying first class priority, the push button on the middle size suitcase was jammed in transit...it was stuck in the pushed mode...the handle was in the down position so we were able to fly it home...i then contacted customer service via their website two times without a response...i then called customer service who informed me the push button part is not a replaceable part...in fact, it seems they have never heard of the push button breaking before, which i find odd...i took the handle apart and have glued the push button back to it's arm that had broken off within the handle...time will tell if my glue job holds on a high stress part...my only issue is with customer service and lack of replacement parts...using a more expensive travel set may be worth the customer support because airplane travel is so rough on luggage...for all other modes of travel this set is great with tender care and use...