waterproof`

Is it really waterproof.Most reviews say that they leak after a few uses underwater

Hey thanks; But I had an olumpus,brand new and the battery would only hold a charge for maybe an hour I chargred it overnight twice.

My Canon D10 has not leaked after several uses to 25 ft and the requisite several-hour-soak after each time I take it to salt water.

Battery holds a charge for a couple hundred shots, and recharges in an hour with the included plug-in battery charger.

It's a great camera for the outdoors.

Since underwater cameras can't change their volume during the dive, most of them have been designed with that in mind. Compact digital cameras can't extend their lenses outside the casing, and Canon D10 solved that "constant volume" superior to all other similar products. While Olympus (and other) similar waterproof cameras have slimmer shapes, their optical systems due to that fact must have results optically inferior to the inline system offered by D10. The trade-off in the resulting bulge isn't so big, anyway. Canon can pursue that line of thinking easily further, to finally produce something similar to Nikonos amphibian line of cameras, and I wonder why this didn't emerge yet, for it is equally easy to produce a quality digital amphibian camera along the line of thinking that was used with, say, Nikonos III - best in that line by far.
What the perfect underwater camera should have is known for ages already, an it is the capability to withstand depths of 50 meters, have interchangeable system of watertighted and water-corrected lenses, a minimum of openings sealed with really rugged o-rings rather than flimsy sleeves, all commands linked via reed relays and outside magnets (to reduce openings) and a reliable, o-ring sealed outer flash contact point.
The large monitor now solves all problems that the Nikonos users once had, thus making optical viewer a comodity used only above water.
Who knows, maybe some Canon designer reads this and makes one old diver-photographer happy to see all that while still alive and swimming, hehe. My 2 cents.