We have one for DD1 who went into it at 2yrs - she got it for her birthday. She loves it and we had no transition problems at all. She has always been small so a full sized bed was a bit scary for her too. I think she will be in this one at least for another year and then Miss J will take it over.

Also she has fallen out a couple of times and because it is so close to the floor she didn't even wake up! I just heard a thump and went in to check on her and she was on the floor