I have a 2yo dd and a 7mo dd.
our oldest dd has been in her own room from 6mo but since youngest was born she started waking and we brought her into our bed for fear she would wake the baby. Before that we would let her cry it out so she didn't end up in our bed.
Now it is every night that she wakes up at 1am and comes into out bed. Dh has been sleeping on the couch 
Now the time has come to put the youngest into her own room. I feel they would both stay settled if they shared a room, knowing that they had one another there. When I was growing up me and my sister had our own rooms but always slept in each others room.
Or will we be making it hard work, getting them to settle each night? Will they disturb one another rather than comfort one another? Should they have their own room?
Please give me honest advice, experiences and opinions. Thank you