For me, it's not, Mommy. Lalo na 'pag hindi mo s'ya all the time natitignan/nababantayan while he/she's sleeping. It can cause Sudden Infant Death Syndrome (SIDS)… for other reasons.
Okay lang naman basta make sure merong may nagbabantay din. Just in case na gumalaw si baby at baka biglang umalis sa baby rocker. Always have someone monitor baby.
Kung gusto mo, try mo ipalit yung position nya if kaya. Parang kumbaga dun lang sya makatulog tapos ilipat mo na sa bed afterwards. Para din mas comfortable si baby.
Judy Carambas