we've got one... despite me insisting that we wouldn't have one and I'd just use the cot, my mum went on and on that we'd need one and use it loads and in fact now have 2 a spare to go to my mums for when I'm up there! lol.
Everyone has said to me that having an alternative option was definitely helpful and you can pick up nice ones for a reasonable price, we got one second hand originally but my mum told me to take it to the charity shop as it was a bit minky and better for a child to play with and she bought me a new one! lol. Think it was £30 or so from Tesco or something so worth it even if you find you don't use it masses you can always sell it on and get some money back!