I purchased this for my Fujifilm J10 and have to say I am very impressed with the quality of the product for the price.
I did an initial test in the bath putting toilet paper inside it to see if could hold out the water. I shook it about, dropped it against the side and squeezed it underwater, when I took it out and dried the outer casing, the toilet paper inside was bone dry.
I then braved it and put my J10 in the casing and took it to the beach, electronics worst nightmare... SALT WATER! took photos, took videos. apart from the expected problem of using flash in dirty water (flash just bounces off all the muck making it hard to shoot) the images came out at a high standard and the video looked amazing ( I was able to re-create the opening sequence of Jaws). The casing has no optical distortion on the camera so Images aren't effected by the case.
The buttons used to operate are defined and easy to access, but a little tough to press, not significant enough to say its a design flaw but if using over a very long period I can imagine your thumbs being abit sore.
The only down side I can really say about the product is that they are abit stingy with the special gel you use around the rubber seal to give a more water tighter fixing, they give with it a small tube and mine wasn't even half full, but you don't seem to need much when applying it.
All in all I have to say this is one of my best buys, perfect to taking to the beach or to photograph the family at the water parks, looking forward to taking it with me to Florida.