We moved DD1 when she was about 20m because her sleep was horrible and I had nothing to lose. Bedtime was taking 1-2 hours! It miraculously solved our problems!

DD2 is 21m and bedtime is taking up to a hour. She won't sleep till 9pm and is up for the day at 5am. I'm exhausted, want my evenings back and she has got to get more overnight sleep than 8 hours?!! Thinking about converting her crib this weekend! Wish me luck!