Hiya
My son is 2 yrs and 3 months, he's still in his cot bed.
My neice who is the same age has just moved to a normal bed and she's doing really well in it, but her parents were having trouble getting her to sleep in her cot.
I think it's whenever feels right for you, someone once gave me the advice of leave them in the cot as long as possible - it saves a lot of trouble of them getting up on a night!!
We are thinking of putting Finlay in his bed soon, I can just picture him clambering into our bed in the early hours of the morning which is putting me off!!!