With a million HD camcorders on the market, and usually only minor differences between them, it gets pretty easy to confuse them. The GZ-HM550 actually has some pretty distinctive features. This HD cam is characterized primarily by Bluetooth technology, and by the capability to shoot 9-megapixel still photos. That's right - it shoots photos that are nearly as large as many still-photo digital cameras (and yes, you can shoot both stills and video at the same time, but that takes you down to 5.6 megapixel photos. Still outstanding). So much for the idea that one unit can't do both. Be prepared for the GZ-HM550 to cost you quite a bit more than other HD cams with otherwise-similar features; it's that super-high quality image sensor that does it.