I am totally for this to save the awesome amount of typing and splits that go into my paycheck every month. Man, there must be 10 different things I'm paying for -- health insurance, taxes, social security, etc. -- it really slows me down to type in all those values -- and what really gets me is they are usually the same amounts every month! Even on months when they're off by a penny or two, having the split already entered would have done 99% of the work for me of opening up the split and manually typing in the accounts. It's nothing to correct the amounts. And yes, I remember Quicken (shudder) doing this for me, too, back when I had it.

For me, the whole game is time savings, and this is a prime area for time savings.