Yes, I say they are very good. Little different than what I'm use to. I believe, coming from one who also write songs and sings, they are quite a unique group. While I was previewing their songs I notice the popularity wasn't very high with "Go Tell It On the Mountain." When I heard them started to sing the song their unique music style really made me want to listened in more closely.
I have to admit I have forgotten all about this type of music for quite a few years. It's wonderful though, how this group has taken traditonal Christmas songs to share their type of music.