These have become my go-to strings for flatpicking. I use medium gauge and just cannot get the same satisfying tone with phosphor bronze or 80/20. I have also been using them on a cedar and East Indian rosewood guitar for fingerstyle: contrary to logic they sound better than other strings. I have one guitar they just do not sound at all good on, so I use phosphor bronze on it. They really do last a long time, they don't turn my fingers black, they tune up well, and are easier to fret than same gauge bronze based strings.
easy to play
ConsNot for every guitar, you just have to try them.