Seems they would work very well for concerts
My opinion: I like these a lot.  Small and unobtrusive.  I have found no problem getting them in and out of my ears.  I like that they stay in and don't &#34;pop&#34; super easily when moving your head around.  I have yet to use them in an actual concert but I have tested them with loud music and it literally just softens the sound without getting rid of much quality.
Rating: 5 stars