My dog is a 45 pounds and 3 legged. The only problem I can say I have had with him in this is that he is never in the same place I put him. He rolls this all around the house like a hamster ball. LOL. As far a durability I have not had an issue. he doesn't dig at it but he walks it over and over till gets where ever it is he wants to be. the kennel folds up flat and stores in very very small space. my dog does't mind going in his kennel but it did take a few days for him to get used to the difference he was accustomed to the metal and was a bit scared of this one till he found that he could move it. now I think the likes it a bit to much. If and when this kennel wears out I will be purchasing another just like it. and one more thing. My dog has long toe nails and so far I have not had an issue with him ripping this up. I have had this over a month and it shows no signs of tearing up. if your dog has vision problems he/she may try to go in on the wrong side of kennel as parts of it look the same. sometimes my dog tries to push in on the wrong side. I hope my feedback on this product helps. I wont use the metal one again this is way to convenient.