Just got a set of Sugars through Elderly, and slapped them on my Farallon (which is both very responsive to string changes, and quite picky). After playing them a lot over the past three days, I think they're the best strings I've used to date — at least for this instrument.
I'd describe the sound as a nice, clear, chimney tone with excellent sustain. And like the Carbon Blacks, a distinct "plunkiness" to the initial attack, which I quite like. Most important for my purposes, the unwound C eliminates the boominess typical of that sting, and balances it nicely with the rest of the strings. Sounds great strummed, but really excels with delicate fingerstyle playing. No detectable squeak on the set I'm using, but it could be my fingers...
My only complaint is the thickness and harness of the strings. The C and E are noticeably thicker than most anything I've used before, but they fit in the nut (although the C seems to bind up a bit, making tuning a bit of a hassle). Had to lube the slot, which helped. Although I can't be sure, they seem thicker, denser, and harder than the Carbon Blacks, which has been a bit of a trial for the fingers. Also pleased to report that they haven't broken yet -- a problem I often have with the Carbon Blacks. Although I loved the CBs, the constant breakage was a deal breaker, pun intended.
So, overall very pleased. Aquila has won me back with these. Best tone yet on my Farallon, for my style of playing and desired sound profile. Would definitely like to try the new smaller gauge sugars when they become available...
