It has been great to read everyones comments. Ava is 9 weeks old.and has been sleeping really well at night on her side but has been very unsettled during the day. I tried her on her tummy out of desperation and she sleeps really soundly. She is able to lift her head but can't quite roll - is this a problem as I too am Paranoid about the SIDS thing. She does let me know when she has had enough...