For an extending compact like that, you'll want the #420 bag with the hard tube and built-in lens or you'll be straining the zoom motor, particularly under the pressure of 5m of water. Even then the spec some websites show of a 30mm interior extension is about 2mm too optimistic. I needed to insert a spacer cut from a plastic funnel and rubbed down smooth to fit my cheap little Fuji in without it whacking the glass whenever I turned it on.
You'll also want to make sure your camera doesn't rely on a sliding power switch or a dial selector, as you'll never be able to operate it through the bag. And if the badly thought-out paper dessicant sack bursts the grains are very likely to kill your camera, even if seawater never does.
Still, the bag itself is a damn good piece of kit and a lot more worthwhile than those diving cases they only make for the most over-priced cameras. So other than actually trying it in a real environment or saying anything useful about it, great review guys...XXX