At my company, we have it. It's actually really nice. So before I started using it, I just thought it was to look cool. Our county required it. I had one partner that always used it and so I used it with him. When I stopped using it with someone one day, I realized how much it muted the sound of the siren, made what I heard from them more clear, and also what I heard on the radio more clear. I prefer them now.