The concept is very ingenious. For Masters who like to give back their freedom to doggie without having to struggle with the carabiners of fixed leashes, and being able to regain control just as quickly is perfect. In addition there is a fixed and solid handle on the back, and two additional fasteners. One under the handle and one on the chest to swerp explosive starts. Shoulders are well cleared. Now for the benefit:
1-the additional fasteners seem fine to me...
2-to block the leash, the gesture must be faster and more frank than I expected.
3-to rewind, there must be no twist or twist otherwise it gets stuck.
4-I would always keep my dog in sight in case the loop gets caught somewhere (branch or other).
5-for powerful dogs that have an explosive start, I would not be serene. My 33 kg labrador broke me several leashes which seemed to me to be of similar quality to this one.
