I put Jack into a cot from day 1 in his own room and all. We bought a "Snuggle Bed" which we put into the cot to help make it a little more cosy for him and also the tetra mattress that the snuggle bed is made from is SIDS freindly which was a fanatastic bonus. We also took the snuggle bed with us on weekends away etc to give him the familiar surroundings and smell of his own bed as it fits nicely into a port-a-cot. He slept in it until he was 6 months old. Still, it was about $100.00 but I'd swear by it.