Highland 20045 Universal Pet Barrier

As a barrier, it works fine. It is easy to put up and take down. Every once in a while my dogs can get past it, that is when I know it's time to tighten the screws on the bars. It could use a little pad or something on the top cups that sit against the headliner of the car, they leave marks. (But anyone that lets their dog ride in the car knows they'll never keep it pristine anyway.) It keeps my three dogs in check in the back. I've also purchased and occasionally use the extra bar for the full set up when the back seat is down.
I also agree it could use a spring tension for placement. That would make it easier, but set up is pretty simple.

This pet barrier is functional, but not fully universal, or 100% escape proof. I installed it in a 2006 chevy trailblazer and due to the fact that the top pads do not adjust to the countour of the vehicle, I had to move the vertical poles in more, causing instability. Also, the side slide extensions do not lock and the dog could move them over and get through. I had to secure them with tape to make them more escape proof.

this is definitely built for large dogs. A very smart dog may get by, as the horizontal bars do not lock. So far, it works for me.

I was very excited when I found this at a garage sale brand new in the box, but immediately started questioning whether it was even worth the $3 I spent on it. I thought it seemed easy enough to put together, but when I tried going for a drive with my 35 lb puppy in the back, she was able to separate the bars in seconds and quickly made her way to my lap...exactly what I was trying to avoid. The screws that provide tension just don't seem to tighten enough to stop the bars from separating. I've thought about purchasing the extension kit so that I can put the bars really close together, but I'm not sure it is even worth it if I can't keep the bars from moving apart. Might work well for calmer dogs (my 50 lb dog didn't even try to get through- just seeing the barrier was enough for her), but this doesn't seem to be the answer for keeping determined dogs in place.

This item is great - it fits well in our VW Passat Wagon. We have a very large dog, so we did need to tighten the vertical pipes once to keep her from knocking it loose. Easy to adjust & install, lightweight as well.