WE always went with a double for our two. Never hit anyone, except that person that backed into us while we were standing still waiting for them to take a picture. Its easier if one parent has to run a do something (bathroom, get food etc). Easier to find one stroller. When taking transportation, can divide us and one take the stroller and one the kids.

Eek. No offense, but OMG, no.
Again, very easy to maneuver. But, anyway, to each his own.