We have been given a John Lewis wooden crib with a side that slides down, but the slide is a bit sticky and clunky.
I thought not a problem as I imagined that the side stays down all night but DH thinks that you have it up most of the time and only slide down to lift out the baby for breastfeeding/ cuddles etc.
Can/should the side next to the bed stay down? There's a strap to attach to the bed.