Kila labs stethoscopes

Hi

I'm finishing nursing school in several weeks (!) and I'm looking for a new stethoscope.

I've heard some good things about Kila stethoscopes as a less expensive alternative to Littmann.

Does anyone have a Kila cardiac, cardiac with bell, or single head stethoscope?

How do they compare in quality and sound to Littmann? Are the earpieces comfortable or interchangeable with Littmann earpieces?

http://kilalabs.com/

Thanks