As others note, this is a great product for easy set up, pack and travel.  My puppy loves it and will put himself to sleep in it.  The reason for the 3 stars is because it took my 9 week old puppy 10 minutes during the first use to unzip the zipper for the door.   We have tried positioning the zipper at different locations and this has not stopped him.  He is a small breed mix weighing only 6 lbs.  He is not able to unzip his small carrier zipper.