I'm looking at transitioning our boys to co-sleep in the future, and like the look of the style of bunk bed where its single on top, double on bottom... they've certainly come a long way since the plain ones when i was a child!

What age would you think its safe for a child to sleep on the top? ironically my 2 year old has already had a serious accident on a normal single bed with a guard rail, so i am dubious about the height factor, though bunks seem so convenient for space saving. Plus they have the option of sleeping together in the bottom bit, or one in each.

What are your opinions and does anyone have kids co'sleeping? how is your set up?