Makes dinnertime with young children more bearable
They work.  I can tolerate my screaming young kids a lot better a dinner time but still hear clearly.  I'm not sure the 20db less is accurate or how that could even be across all noise levels, but it 'takes the edge off' the noise.  I use them frequently.<br /><br />The above would get it four stars.  The reason I gave it three is because I bought this one for the hook on the container, as opposed to cheaper competitors.  The hook is garbage.  It bent open within a day in my pocket connected to keys and the keys fell all over.  The canister could also be much smaller and hold the earplugs.
Rating: 3 stars