IMO, it depends.
I focus on trance/J-pop/J-rock/techno music. I find that the beats are always easier to lay out because you can tell when there's a BPM change or a freeze (most of the time). Since I work on a Mac, I use the assist tick in SM to lay out everything, and manually edit if I have to as well.
I also find that these songs interest me the most, so I work with what I have, and go from there. =3 Sometimes the files are easy to synch, and away I go. Other times it can be very very frustrating.
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