I have heard, also, that if you are an obese person, it's recommended that you not co-sleep because you may not feel the baby.
I have only co-slept with Gabby once or twice during the day when she was a newborn. Every little noise she made woke me up so it wasn't a very good sleep. She's always slept much better in her own room.
Still... I look forward to the day she can get out of bed and come into our room and snuggle up with us for a bit of a sleep-in. A while away yet!!