About four days ago....she is 18 months. Its been pretty smooth so far, but then she doesnt self settle, i put her to sleep then pop her in bed. I think she likes it beter casue she has more room to move around, she always ended up crammed in a corner in the cot and woke up because she was stuck.
My DP thought she was ready so i just went with that, she loves it and always tells every one about her big girl bed!!! GL