Because have not written some reviews that at this products match no holes, I was prepared for the worst. But it was not so bad. I have the box assembled quickly - instructions provided was useful - and only the last bolt has not to be purely rotate immediately. But this was resolved very quickly with a metal file. Minimal aufgeahlt and already the screw was in it. All in all a good product. Dog feels comfortable and more can not be expected at this price!