This works fairly well but my puppy has a hard time staying in it. She prefers to lay on my lap while I drive and I would rather she stay in the booster seat! LOL! Its a great product and works well although she won't lay in it. She prefer to lean over the edge of it with her front paws.
Previous reviewer (Merry Christmas neglected to read the online manual for this product. It states clearly that there is a harness anchor and highly recommends this product be used only with a harness and not a with a collar, for animal safety.