Yes, Catherine's is a cot bed too so while it's now a bed, it's a very low to the ground one and has a bed guard on too!
While she gets in and out of it easily during the day, she's not tried at sleep times yet which is good in that she's not getting in and out when we want her to sleep but is not so good in that she's still sitting there yelling to be gotten out in the mornings. Still early days though so hopefully she'll get it soon.
Alex was just past 2 when we changed the cot bed into a bed for him too, which then got swapped for a low bed after a couple of months as I was expecting Catherine and needed the cot. I guess that's what made it feel like the right time to change even though there's no one new needing the cot this time.
I had both of my babies on the 17th - 1 in March and 1 in December. It at least makes remembering birthdays easy :)