What can I say? Easy to use and incredibly smart. I used it only once so far. One night last week i was encoding a double-pass DivX and in the middle (well-shortly after) of the encoding a nasty thunderstorm caused my mac to shut down abruptly (i have a belkin multi-plug with power-surge detection).
As it was just after the beginning of the second pass, restarting D-Vision amzed me as it was beginning the second-pass encoding ONLY! Thus saving an hour and half of the first pass.
The mechanism of the tasks is so smart!

Thanks
Paolo