Hi music 5! Yes, I've heard them sing and they're really good. I remember the first time I watched them at the Cultural Center Of the Philippines last 2006 and I was impressed because their sound was balanced plus their dynamics were executed perfectly. Aside from having these qualities, what is so amazing about them is that they are sitting while singing . I know it's hard to sing in this position because it is difficult to breathe. But they've done it without showing difficulties on their faces or the way they sing. They even sing long phrases and you can't see them suffering or catching their breaths. This group won many prestigious awards in Germany, Austria, Italy, Poland, Spain etc. Their recent award was a grand prize at the Florilege de Tours in France last 2006. I hope others who don't know the Madz will enjoy them as much as I do. By the way music 5, I just want to know if they were the one's who popularized singing while sitting.