I voted before 12 mths as he was closer to that that 18mth. We decided to move him for lots of reasons: 1. he used to roll in his cot and wake himself up hitting rails. 2. We co-slept for part of the night and found by coincidence one night that he slept in a single better than in the cot I think because he thought he was in with us. 3. It was a lot easier to put him to bed because we would sit and read to him and then just lay down and pat him until he went to sleep.

We did get a bed rail which we took off when he turned 3. We didn't have any trouble with wandering at nap times because I always sat with him until he was asleep. Now that he is older we sometimes set a timer and he knows he needs to stay in his room until the timer goes off. I have actually given in recently and let him stay up instead of having a nap. Now I have babbled too long, sorry