Kick out the baby

I know the recommendation is to have baby in your room for 6 months to 1 year but curious when everyone put their little ones to their own room?

Since the risk of SIDS dramatically decreases at 4 months, I was thinking of trying to wait until then, however we're at 3 months and ready for her to go. Her grunting wakes me and my husband and honestly I probably soothe her far too soon because I'm convinced she's awake.

When do you move your baby? Did you notice improved sleep? Did you use a monitor or just hear them with the doors open? Thanks!