I love this carrier and best of all so do my dogs. My friend Kelli was the one who turned me onto these - actually it was her dog Toby who loves his so much. We went to a dog show together and Toby loved his so much that Kelli had to take it to the show so he could ride around like the Prince he is. I have tried most of them and this one is great. I have it in the small and medium (you can't use the large size on the airplanes) but it is so easy to pull through the airport. The original company was "Pet Wheel-Away" but was bought out by snoozer. I got mine on ebay (be careful of imitations - not as well made) and one at Tuesday Morning. Just check on ebay for pet wheel-away or snoozer products. It can be used as a backpack (not all models), car seat and a bed. Mine is always on the floor because someone always wants to sleep in it.
www.snoozer-dog-beds.com/WheelAway/wheel1.htmou