Comments about Canon Canon WP-DC19 Waterproof Housing for the PowerShot SD950 IS Digital Camera, Waterproof down to 131'.:

I like the fact that this housing is so small & streamlined. It's very easy to strap onto your wrist and just have tag along on every dive. I have had quite a bit of problem with fogging of the lens halfway through the dive. I live in the tropics and discovered that if I keep it in the car with the airconditioning blasting before sealing the housing, it is much less likely to fog.

My biggest complaint with it is that the flash diffuser isn't very heavy duty and cracks or breaks easily. Canon won't let you just buy another diffuser even though it is an entirely separate part. You have to buy another whole housing to get another flash diffuser. Not at all user oriented.