I've owned three Sprague stethoscopes and decided to give this one a shot, and I'm really glad I did. Lung and heart sounds are much louder and clearer. As others have mentioned, the annoying flaw in the design are the earpieces. One side feels secure, the other unscrews and falls off far too easily. Nothing like reaching for your stethoscope when you need it to discover you're missing an earbud. The best solution I've found is teflon tape.