We miss the first half hour of The Sing-Off because we’re watching How I Met Your Mother, but after that, it’s the definitive choice for filling the time until Castle comes on.

I appreciate the skill it takes to be an a cappella group. There were times last season when it sounded like some of the groups had bands backing them up.

I like the judges on this show more than any judges other than those at The Voice. Ben Folds is terrific. Their critique is constructive and overall positive. How’s that for a concept? Help your singers get better.