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They are easy to use simply gently push them to give them a slight twist until the flanges seal the ear canal. The downbeat come in a cool little metallic case which can be attached to your key chain for the avid concert nerd. The Haight Street club was a small echo chamber so the downbeat's were worth their weight in gold. I'm a stickler for fidelity especially at live shows so I would only give these a short chance and if they did not live up to their claims I would've chucked them ASAP. But they really did enhance the live experience and actually made the band sound even better. We give the downbeat's a Nerd Stalker thumbs up, you can get more information downbeats.com.