Havent read your other replies so im probably repeating.... but DD goes to bed in her room and i bring her in with me when she wakes up, anywhere between 12 and 3. If im really tired i bring her in with me, get her to sleep and then take her back to her room.
DH smokes a little still, so DD doesnt sleep in the middle, i have a bed rail that you use on a todler bed.
I think its fine to have DD in with you for a few days. sometimes i will stay in DDs room and settle her and put her back into her cot, if DH is sick or been out drinking. And she is fine with that, wakes up at 5 and comes in then.
But i find that co sleeping saves my sleep, otherwise my day would start at 3am most days...getting up to resettle her takes an hour, then im awake and by the time im just getting back to sleep its 5am and she is awake again!
I say go for it