Has anyone used a “swimtrainer classic” floatie with their baby? Apparently it puts the baby in the right position for learning to swim (ie, the baby is lying in the water) and is supposed to encourage a kicking reflex that babies are born with. Their website says it can be used for babies aged 3 months to 4 years. My friend has a 4 month old and she uses it all the time. She says her daughter loves it and has started kicking around the pool already. But I’d love to hear whether anyone else has used it and whether they think it is safe and effective? I have a 6 month old that I would like to use it with. Thanks.