Lucas has a cabin bed, been sleeping in it for around 3 months, used it in the daytime to play on and practise using the steps on his own for a few months before. Moved into when he was ready. Uses it fine, able to climb up and down unaided, very rarely gets up in the night but if he does no problems. No way he could accidently fall out because of the sides and knows not to lean over. Guess it depends on how well you know your own child.