The Ruffwear Load Up is one of just a few car harnesses on the market, which have been crash tested. I purchased it when I discovered that my dog's existing harness was prone to catastrophic failure and am very pleased with my purchase. Once you have made the initial adjustments to ensure that it fits your dog (spend 10 minutes or so to get a good fit), it can be fitted and removed within 30 seconds. I particularly like the fact that the harness is not a 'step in' design, which I have always found more difficult to put on my dog. You place the collar section over the dog's head and connect the stomach "bib" section to the back section with two heavy duty stainless steel buckles. It really couldn't be simpler, then feed the seat belt through the webbing loop and your dog is secured. It seems to be well made and offers enough freedom to allow your dog to sit/lie/stand. Like anybody who buys this type of product, I hope that I will never have to test it's full capabilities. I do feel though that in the event of an accident I have given my faithful companion the best possible chance of avoiding injury.
Not cheap but I'd strongly recommended it if you are looking for a robust car harness for your pooch.

Cher mais mon chien est vraiment protégé : le harnais couvre bien la cage thoracique et la colonne vertébrale. Il est facile à régler grâce aux sangles.
Le mode d'emploi papier ne me paraissant pas clair j’ai visualisé la vidéo : impeccable !