If it works for you, then do it! There is no way I would have gotten half the sleep I have had in the past year if not co-sleeping...I just used to hold DS in my arms, when he stirred I was instantly awake....we now part co-sleep (with him in our bed) the cot is right next to our bed (which is technically classed as co-sleeping ) once he falls asleep in our bed, I move him to the cot, started doing that as he woke one morning ad now that he can crawl, managed somehow to not wake either Dp or I and dive bombed off the bed!
There are little cosy sleeper things that you can buy, like little soft bassinets with sides etc, that go in your bed for the baby to go into, never used one, but they look good.