"I hate to be the one to only give one paw, but I am so disappointed in this car seat. I got the large size for my Westie, who is 17 pounds so I thought she might be too big for the smaller version. The big size barely fit in the backseat of my car and I still had to buckle the seat belt into the middle one instead because the seat overlapped so much. I think it would fit much better in an SUV.
Also, the tether is way too long even when it's adjusted to the shortest length. My dog could jump out of the seat into the back of the car because it was so long. Needless to say I'm returning it for something better. If you have a dog who lies perfectly still, this is probably an OK seat, but if you have a dog who likes to move around, don't get it."