DD was just over 2 when we moved her. Altho she slept odd angles in the cot once she was in a bed by a few nights she started sleeping straight.
We took her with us to pick the bed, sheets, doona cover etc, called it a princess fairy bed made a big deal about it so she was very excited.
First night she climbed out the end and was crying at the foot of the bed quite upset but was ok after that stayed in til morning.
Only other thing was for the first few weeks she started getting up a fair bit earlier cause she could get out on her own, so it was like as soon as daylight came she wanted to get out, once the novelty wore off she slept longer.