DD1 got a cabin bed for her second birthday. She loves it and the only worry that I ever had was her hitting her head on the solid border around her when she was tossing around at night half asleep. I just used a few pillows for a while but now we have no issues. We don't have a ladder for her to climb up or down so she calls out to us when she wants to get down.

She has never fallan out once (touch wood)