We used a gate with DD#1 as it was perfect for keeping her confined to the lounge however we have moved to an open plan living house and so we will probably be getting a playpen as I won't be able to keep her out of the kitchen. Will probably use the gate to keep her up one end of the house (away from Daddy's computer stuff ) but for when I need to duck out the room I feel I need to know that she is as safe as possible. (and its bigger than the cot) But when I'm back I'll probably take her out of it......although I will still have some playpen play time if that makes sense.