There's no mention of how deep the waterproof case will go, despite you giving a page of the article to this accessory. There's nothing on the makers website either (not helpful, but not your fault). Is it for pool use, or suitable for diving? Its also helpful if you can confirm any waterproof rating for guarantee purposes as opposed to the legally useless "water-resistant"

On one, the flash failed within the first week. On the second, the flash failed after a month and it had a poor USB connection, so half way through importing photos, it would just disconnect. The third one is going okay, but I don't know how long that will last.

First, below about 4-5 feet, the pressure will seal all but the most busted cases. Second, below about 30 feet you'll almost certainly need a flash. And below about 75 feet you'll need an external flash. Thirdly, NO VIEWFINDER? Using an optical viewfinder really steadys the hand. This is a well established fact.

"How do you sell a seven-megapixel camera when so many rivals are doing the same? You can't rely on the usual features - big LCD, anti-blur tech, slimline metal casing, etc - because everyone else has those too. No, you need something a little different, and in Casio's case that means offering your latest compact camera with an optional underwater kit."

Pentax and Olympus already sell p&s cameras that are waterproof down to a couple of meters, and you can get casings for many other p&s's. Nothing new here then...

...a canon IXUS 850 IS, this is 7.1mpix too and you can get a water proof case that goes down 40 Meters, and this camera has an optical view finder. (lovely camera btw :) )