I think I have the 602...it's the ADC that looks like the Cardiology III. I like it just fine. All the residents, and med students in the hospital seem to have either the Littmann cardiology III or the classic SE II, and I might get one down the road. But the ADC is serving me well for now, it looks nice, has worked fine so far, I haven't had any issues with heart sounds or seeing patients (at least to my ears, though I never compared it to other scopes, as this is the only stethoscope I've properly listened through). I like that it only cost $70, since I won't feel as bad if it gets dinged, scratched, lost, or stolen, as compared to damaging or losing a $120 stethoscope.