Andrust:
I can argue that point, if you got two circuits to run 60 feet and 25 joist to drill through and can run a multi-wire instead sure sounds a whole lot quicker to run one multi-wire then having to run two single circuits.
I use them all the time its just when the DIYer gets hold of them that there seems to be problems with them, ie back fed breakers, because they added a circuit and didnt understand why a red wire was there instead of two blacks.
Its really a nice way to balance loads when done right.
-Mark-
