Using the bags takes a little getting used to, but they are simple enough. They do compress clothes well. The large, medium, and small bags all fit in my 26 x 18 x 12-14 in expandable spinner suitcase with enough room to spare for a large toiletries case, couple pairs of shoes, and some outerwear. Pump operates easily, though I think I might have trouble if I ever want to change the nozzle/adaptor. Inconvenient for a tour that included changing hotels every day- a lot of unpacking and repacking-...