I like this collar a lot, as I end up walking my dog after dark quite often. The collar looks pretty sweet and improves our visibility a lot. My dog gets really annoyed if I put the collar on either of the flashing light settings and will pretty much give me the stink eye until I fix it. I also feel that the collar is very soft and not particularly sturdy. It feels like it could come apart and ravel easily. I don't attach a leash to the collar, as I always walk on a harness, but I could see attaching a leash to be a problem with the collar breaking. I am satisfied with the product, I just caution others to know the limitations of the collar.