The SC-1s have seen a lot of action - great on larger bodied acoustics ( though, being wide cardioid they're not as directional as some may like & I've found you have to be pretty careful with placement if recording acoustic & vox at the same time), great as drum o/heads, I've also miked up acoustic bass, guitar amps, banjo, mandolin & various percussion with them - all with superb results. They REALLY love the mandolin!
Also, I've emailed Larry Villella a number of times with various questions about his mics, and each time he has replied within minutes & provided detailed, bullshit-free advice. Needless to say, I'm as impressed with his companys' attention to customer service as his products themselves.
He tells me that ADK are bringing out an updated version of the A-51 SC ( ST 1), with changeable capsules in December - maybe to rival the Oktava MC012 - so that should be worth a look.