I'm on my phone so can't see your sig, how old is your DD? Mine was about 16 months when we took the side off the cot and put up a rail, DS is now the same age and we're doing the same this week.

We never had problems climbing out when she shouldn't, but if she did it was a lot safer than climbing over the side of the cot. It was actually really good in the mornings, she'd wake up, get out of bed and come down to our room - nicer for us! And with regard to your original question, it did make night time easier. We could lie with her if needed and it was easier to get out. Also easier to just hold her while sitting on the floor next to the bed.

I'd probably give it a go.