We just moved our boys into one room last week and we haven't had any problems so far. It doesn't make a difference if they go to bed at the same time or at different times to each other. Neither of them wakes the other up overnight and it's so cute when they both wake up in the morning and start giggling together .

I shared a room for many years with my sister and we had no probs either. As teenagers we would have appreciated our own space though! We plan on extending our house up in about 5 years time so the kids will eventually have their own rooms again, in time for the teen years