I haven't listened to this band all that much, but I like them a lot. Melancholy indie rock about everything sad in the world. Lots of male/female harmonies and somber piano stabs in between plucked minor guitar. They remind me of another defunct band, Very Secretary.
Two members of Carissa's Wierd went on to form Band of Horses, which some people like. Also, "weird" is supposed to be spelled like that.