Somewhere up above, Piers Plowman asked about the XB-40 ("Extreme Bender", that is). I have a few of them; however, I do not use them to their full potential, in the sense that I don't bend much to get the "missing notes". I don't play a lot of blues/jazz/pop these days, and I don't like the sound of bent notes, no matter how cleanly hit, in straight-ahead fiddle tunes on the harmonica, which is what I mainly do play. As for those missing notes, I follow the thoroughly traditional and thoroughly unfashionable practice of finding ways around them. The XB-40s I use mainly for sessions or other situations where I need greater volume than usual - and since I don't play much in public these days, I don't use them often. But those in the know say that you can play them quite loud on a regular basis without damaging the reeds. Perhaps because of the price, they don't seem to have caught on in a huge way. And some players just don't like the tone, but that's a matter of taste.