Hi Our little one slept in the Amby Hammock until he was about 11 months and then went straight to a cot. He loved the hammock and literally used to snuggle straight in an nod off, beleive it or not he used to cry to get into it when he was tired! In winter time I put a lambs skin in over the matress for extra comfort, although this isn't necesasary at all. He looked so snug and safe in it, the first time we put him in a cot, he looked lost in it and I know he missed the comfort and security the first few days. I know they're expensive, but I believe they're really worth the extra. We bought one on ebay, really good condition and would definatley use it if we have another one. PS... He also has a perfect little round head!! ;-)