I use the wire crates from walmart. They have added an additional safety feature to stop them from collapsing that makes them a tiny bit more of a pain to take down. However, I'll take that for the safety feature, especially with a young animal.
I also just invested in a pair of soft crates for the suv. I'm very happy with them and they pop up and down at lightning speed. They are less irritating then the wire crates for vehicle set up I find. I'm not allowed to leave a perm set up in the SUV
