Baby Swimming Lessons - When Can Baby Start Swimming Classes?

Your little one can start to take baby swim lessons from six months and up, with you holding baby in the pool and getting them comfortable and familiar with being in a large body of water.  Real swimming lessons don't commence until your child is around 3-4 years old and able to take instruction in the water.  Still, it doesn't hurt to introduce your baby to a swimming pool and a new experience.  We have heard of Infant Swimming Resource which is an instructor based course which trains babies as young as 6 months to potentially survive in a body of water.  This technique has very mixed reviews.  Babies under a certain age are literally trained to "self-rescue" if dropped into a pool and float and cry until help comes.  Classes are offered at nationwide locations.   It's a little creepy to see a little baby keeping its head above water in a self-preservation float.  But fans of the program want to be prepared for the worst case scenario.  What are your thoughts on ISR?