If so, what brand and are you happy with it?
DISCLAIMER: We are expecting a baby with a lung abnormality, and have previously lost a baby to stillbirth at full term. Although we managed without for our healthy DS, this time round we are anxious and DH in particular feels a product like this might help us. (I'm not some random neurotic mum who wants to buy any piece of baby paraphenalia going. And I do know that there is no evidence that they are useful against SIDS)