Nigel was the man who got me through my PADI course with no problems at all. I can highly recomend him to anyone visiting tenerife and wanting to go diving. He specialises in one to one training and has an excellent teaching style and a sense of humour too.
My pentax w20 survived being taken down to 7meters despite only being rated at 1.5m , below 5m the buttons are held in my the water pressure but as long as you make sure it is turned on and ready to go before you get too far down it still takes great pictures and does not leak a drop internally. It is not the worlds greatest camera, by previous canon took better quality photos for the same meagpixels, but its quality is fine for an amatuer like me and the fact that it is nearly indestructable is far more important in my case ;-)