What dog cage trolley is best for showing?

We are great fans of Crofts products, and owning their cages made us biased towards their trolleys. Therefore we purchased one of their large wheeled trolleys, although a little heavy (25 kilos), it has folding wheels so it can easily be stored in the boot of your car. It can accomodate two standard 24inch crates, so is ideal for carrying Jessie and Levi into a show venue with ease.