Crate Portable

A portable dog crate be okay?
I want to know if a portable dog is as good as a standard box for my dog golden retriever. Apparently, cozy and comfortable as a hard metal case. here is the link for the dog portable box that I'm considering using for training Drawer: http://www.dogtoys.com/dockdogscrates.html
your dog can learn quickly how to enter or escape the box. these boxes are for laptops dogs are already crate trained. a hard metal or plastic casing is comfortable for your dog, because you put a rubber mat or dog bed on the bottom, and then makes no difference what the sides are made. your dog will not be on the sides, only the bottom. having a rugged is important, especially for a dog crate is not yet trained. I prefer boxes plastic carriers are easier to clean, they seem more den-ish to the dogs and contain the hair better and that can only leave empty, and not get behind them and all the sides (and stuck to the metal bars)
Portable Dog Crate