I bought this mainly for diving (along with the appropriate housing). I've only had it a few days and I haven't dived with it yet, but there are some magnificent features, and it knocks my old Fuji for six.
First, the LCD screen is 3 inches instead of 2.5. We mathematicians know that means that the area is nearly half again as big, and that makes a big difference at 15m. Second, it is one click to switch from movie mode to "underwater" still mode. The fuji required all sorts of scrolling and messing about.
Less specifically about diving, the direct printing is fantastic, as are the cropping features, the slightly gimmicky but very arty facility to shoot B&W except for one colour, the fact that you can trim videos in camera, and that the camera knows which way up you're holding it and reorients the pics accordingly, and it all adds up to a feature-packed camera that shoots high quality. I'm very glad I went for it.
My only quibble would be that the body design is boxy in the extreme, and you could certainly buy sexier looking cameras. But that's not really what you buy it for, is it?