Im a second time mom and did not have an issue with my first sleeping in a bassinet (flat service). My second is only 15 days old and I cannot get him to sleep longer than ten minutes in his bassinet. I Remebered I stored the Fisher Price Rock-n-Play I had used with my first occasionally. So my newborn is sleeping great in it. On his second week appointment his pediatrician made it a point that he should really be sleeping in a flat service. I really didn't ask why I just said "ok". So now I've been thinking for the past couple of days if it dangerous for some reason? I will follow up with his pediatrician I just want to get input. I did Google and have read reviews and I don't really see anything on risk of SIDS.