The build quality of this harness fits our 17kg dog really well. He is extra fluffy so wasn't too sure how it'll go but soon as we put it home him it didn't bother him one bit. In fact I think he likes it. Instantly he stopped pulling but it doesn't hinder his walk. We bought the orange vest as it's easy to see in the dark, our dog is literally Matte black and becomes invisible at night, feels a lot safer now that we can see him and the high-vis stitching works well with on-coming traffic.
Can't really fault it, the adjustable straps have a lot of play to move tighter or looser.