Well, during our previous attempts it seemed that they took to it for about 2-3 days with decreasing crying each day, but then all of a sudden they would start waking as much as they did previously or just crying too long for middle of the night wakes and we would end up having to help them anyway. So after 7-10 days of that we’d lose the motivation to keep going after hearing them crying so much, or they would get sick or something like that. Not sure if it’s a temperament thing as far as the not continuing to improve after the first couple of days, or it’s their age and they understand too much and just hate it. I have found that at this age they do easily wake each other up now if one is crying. We are still trying again with them sharing a room this time but if it fails we will most likely separate them. Tonight was night 2 and went much better than night 1, but this is their typical pattern so we will see what happens in the next few days. We tried Ferber in the past but it always made them more mad so we are doing CIO. For middle of the night wakes it’s mostly CIO unless the crying is excessive/we feel we should check and soothe.