It was a little hectic at first but, my wife is real big on setting up schedules and sticking to them so, it kind of smoothed out after a few weeks. Also, as you eluded to, when they were a couple of months old they really started to interact with each other and that made it quite a bit easier. . .they had a built-in play mate. People asked us how difficult it was but we didn't know. ..they were our first and we got two at once.
Looking back (now that we only have one baby this time), I guess it was probably a little challenging. . .wouldn't trade the experience for the world.