Well this is a difficult post for me but I really felt I had to put it up.
Firstly let me say that I think teaching babies to swim is very important, and I took Ashley to classes when he was 6 months.
However.... My Nan's neighbour's 2 year old daughter drowned last year in a very small amount of water in a paddling pool on their back deck. The mother is a swimming instructor, they live on the beach in Australia, the child was very comfortable in the water. I guess the point that I am making is that NOTHING beats constant supervision when it comes to safety around water.
I believe that any skill that gives a child a better chance if they fall in the water is TOTALLY worth it. So I do think the swimming classes are a positive thing. BUT... if they give the caregivers a false sense of security, this could be a negative thing. A child can drown in literally a few inches of water.
Sorry if I to bring the conversation down but this was a subject close to my heart so.... please dont take offense.