Sarah Jarosz opened and it was one of those things where you could tell instantly, "This is a Musician!" Great banjo playing, and then switched to two different guitars: intelligent songs, and effortless pitch.
Crooked Still came on and they're just too good. Besides the fact that each one is a master of his/her instrument, that they meld together effortlessly, and that they can play the phonebook and make it sound fascinating, the incredible thing about them is that they're a truly unique band. No other band that I know of has this combination of instruments (fiddle, banjo, cello, double bass, and voice). It's eclectic yes (sometimes my mind really felt the lack of a guitar to hold them together, in fact Aoife O'Donovan strummed one on a few tunes), but they aren't self-consciously eclectic ... the point is that they sound so marvelous, not that they're breaking new ground.