I've seen a few posts on here about transitioning to a crib. Most of these moms have let their baby sleep at night in a rock and play or a swing. NEVER put your baby down for the night in one of those! Your baby will get used to sleeping on an incline and being in constant motion all night! So, once you try to transition them to the crib it will be hell! Putting them in the swing and rock and play for naps is fine but for night time you should always lay them on a flat surface and never nurse them to sleep! Just my input to take into consideration!