It's a good size and sturdy. The side grips take a lot of effort to clip on. It doesn't have a handle at the top to be able to carry it. This is a crucial part of any pet travel box, otherwise how else are you supposed to manoeuvre it. There is a pully handle for wheeling it about, but the wheels have to be bought separately and you don't always need to wheel it, sometimes you need to lift it. Overall I'm disappointed, but can't be bothered to go to the trouble of returning it.