I saw this on facebook and they said that it gives baby something to lean against, their toys don't get away from them, and it keeps them from drowning because it gives them something to pull themselves up on besides slick tub walls.
It would be a disaster for my son (15 months old). He would constantly try to climb out of it. And as for the preventing drowning part, how about just some good old fashioned constant parental supervision while baby is in the bath?
***So we tried it out last night. He just sat there and looked at me like WTH Mom? lol And then he kept trying to climb out. Maybe if I had started when he was younger.***