I've been using plugs since the early 90s, first foam, then artillery ones with a chromed cap (proper Frankenstein) and for the last 10 years, ACS Pro 17. Swear by 'em! I find that when mixing a band I can hear distortion and imbalances far better than my dafter bandmates who don't wear plugs, and weirdly, you can hear people talking over stupidly-loud music.