Got this for one of our 4 dogs that rides in the front seat. It does give some level of comfort. Our old guy hates wearing anything on his body, but he doesn't seem to mind this as he gets to go in the car, visit the cows and get a snack.
Adjustment and fitting was pretty quick and easy. Product seems well made. Strong straps, nicely padded and, the reason I went with this brand, it seems to have a wider chest area and it has metal clips. The other safety tested car harness has plastic clips.
Overall, so far happy with this purchase. Hopefully we'll never have to really test it out.