Same here - unusable.

Quite often the OS will offer to close the Camera app as it's no longer responding. The Camera app manages to max out the CPU for some reason, possibly because it's buffering the image but at 5fps (and frquently much, much less) it's almost impossible to frame a shot. The lag between pressing the shutter button and the camera taking a picture means you always lose the shot. Also, the application quite often refuses to save a picture to SD card.

I would say it's a waste of time but others have obviously had some success, so I won't.