I bought this after accidentally shutting the car door on the head of my Littmann Classic II, it still works, just looks a little funny. After much research, borrowing stethescopes from my co-workers and reading reviews, I decided on the Master Cardiology. I couldn't be happier. As an LPN working toward my BSN and eventually wanting to get my CCRN, this is the perfect stethescope for me. It took a little getting used to, to vary pressure to hear high and low frequencies, but my husband was a patient test subject. This is a quailty stethescope, as all Littmann's are, and I have no trouble hearing various lung and cardiac sounds with perfect clarity. I couldn't be happier.