I'm glad you recommended them because if you hadn't, I would have. Like you said they're particularly useful for preserving your hearing at live music venues without muddling the audio. As someone who
didn't have hearing protection and attended some really loud venues, the hearing damage I have is a real pain the backside. There's a deep notch in the middle of my hearing range so going to a pub means I hear shuffling of feet and clinking of glasses better than I hear people talking to me even though they're closer and louder. Similarly cranking up the audio on a conference line means getting a painful spike of noise from join/leave beeps when the levels are right to hear speakers clearly.
Can't recommend that people wear hearing protection enough in general and at least for me etymotic make for a pleasant experience.