I bought this tube late March 2012 and set it up in my house with both ends open so my 3 small dogs could get used to it and be ready for our road trip.They loved it!I used it in my car for the first time this weekend and the first pee stop we made the zipper came of its tracks. I had to stop at Petco and but 3 new expensive pet carriers that I really didn't need, in order to keep my dogs and myself safe.Very frustrating!The tube itself is a great idea but it could use some improvement other a than better stronger zipper. Petgo needs to take it on a road trip with 3 excited little dogs to see what these improvements would be.I just emailed Petego hoping they will fix or repair. Waiting for response and will update my review.If you buy one be sure to check the zipper before you use it in your car and avoid disappointment and potential disaster.