My puppies have plenty of room to stand on all fours and turn. It's holding up very well and no problem with the base being removed by my pups. The only reason I gave it four stars is because the crate door is not that easy to open. There are 3 seperate latches with little inset buttons to press in order to open the door and with puppies that takes a bit of time especially for potty. I have made it a point to only latch down 2 of the 3 buttons and the puppies have not attempted to push the door open. I will order another pair once my puppies out grows their current ones.
I love this folding crate! Its perfect for traveling. Its so easy to fold and unfold. The handles and wheels makes it easy to move around. We have a one year old lab. she walks right in no resistance at all - I think she's like that she can see everything around her. Just make sure you order the right size! Think about the future - I made a mistake and ordered large which she will likely grow out of in a few months. But its too late to exchange it now :(