hmmm... i m not very sure oso le.. itz not all "positive effects" as promised but some ba.. i dun see in the first yr tat he can sleep sound n smooth in the middle of the night but becoz of his bad reflux tatz y he couldnt sleep well thruout the night oso.. As in long run, maybe there will be some good effect ba like in term of his temperament.. becoz tis time i m going to use both babyplus n oso classical music for tis preg..