Got this for my lab cross. He can stand in it and stretch out when lying down. He had tried the large (which is perfect for our border collie) but it was too cramped - he couldn’t stretch out and always had to be curled up. He hasn’t escaped from it so I think it’s pretty sturdy. Only weird thing is that they put a hook type feature which faces up under the door on one side and it’s for hooking the crate when it’s packed down - but it seems a bit daft to have it stick out like that! It’s probably easy to bend and take off but I choose not to. Hasn’t caused an issue yet.