Alex, he is very good. Qwaali is a sort of free-style Islamic musical prayer...very sort of jazz form. By this I mean that there is only a very basic structure laid out in the beginning and only a few pre-planned lyrics...the rest develops and grows as the song continues. So its not just the ability of the singer's voice, but his ability to freestyle and the ability of the musicians to play along as the whole song develops. Neat stuff.