D.P.
I put my dd's crib into a daybed at 18 mths, no problems. she never tried to climb out of her crib but seems to do better in just a bed... since ds came along a few weeks ago she's 2 now and we put her in a toddler bed and no problems yet... For myself I changed her bed to a daybed earlier than i planned but being pregnant hard to bend over and all that and the ceilings in my house are low and it was just hard on me and her both so we made the transition.