We've always wanted our boys to share a room. We've been waiting for our youngest (16 months) to start at least sort of STTN. Well, he has, but just when he started, DS1 (2.5) started jumping out of the crib (cue move to big boy bed) and having nightmares.

A part of me wonders if having his little brother in the room could even help his sleep, since a lot of it seems to be insecurity/loneliness?

Anyway, how did you do it? How old were your LO's? How did it effect their sleep? Were they both STTN reliably when you made the move?