I was struggling to get my 4 month old puppy comfortable riding in the car. She was fine on someone’s lap but at 35 lbs. that wasn’t working and wasn’t safe. I tried a crate in the car—she’s fine with crates in the house—but she hated it. Fingers crossed I put the harness on her (a 2 person job but lots of treats later…) put her sleeping pad and giant teddy in the backseat, buckled her in, and went down the road for a test drive. She was so relaxed, no whining, just looking around then she settled down and was absolutely fine! Whew!! I have to buy the next size up as she won’t fit into the Small size for long. The straps and buckles seem a little confusing at first but the online video was really helpful. I’m really SO relieved that this harness is so comfortable for my dog.