Purchased two of these and they fit nicely in the back of my 2012 Subaru Forester. It is a tight fit, so they dont move around either. With doors at both ends I can let the dogs in through the back hatch, or from the back doors if I have the bike rack on the car.  Also will nice to be able open up the hatch and let the dogs have some air if we are parked somewhere in the summer.
These are probably better suited for a van of some type as they make it impossible for me to use my backseat...but at least my dogs are safe!