My initial thought after setting up was that this was a cool concept. Unfortunately, my dog -- who is generally crate trained -- was able to push right through the zipper the first time he was zipped in (not breaking the zipper - it literally just separated from itself and I was able to re-zip from the other side) and he was able to rip through the netting on the door within seconds of us putting him in the second time. (We had previously put the crate up and let him hang out in it/check it out for about a week without ever zipping the door closed to help him get used to it - he is wire crate trained and has never tried to get out of his wire crate). I'm going to look into having someone sew tarp-like fabric into the door zipper to reinforce but it's extra work/spend that shouldn't exist - the door needs to be more sturdy.