As one who lives in the Boston area and thus has had a chance to see them a number of times over the past few years, I think they're quiet amazing. The whole concept of bluegrass cello makes me smile, and Aoife O'Donovan's voice makes me melt. They're definitely not a band for traditionalist purists, nor do they try to be, but I think they're they're fun and energetic and they're definitely introducing the music to a new young audience.