Doesn't widen
It was a hassle setting it up on my own, and the instructions were a bit too dumbed down to be clear. They're advertised as fully adjustable in both height and width. However, no matter how much i pull the vertical bars, they won't budge. My 5 month old Border Collie honed in on the gap either side and got halfway into the backseat. I may just have dud bars or I'm missing something glaringly obvious (again instructions too dumbed down to really help). Other than that, it is really sturdy!