I really have never check out bump skis...but at the local mountain we've got a run full of them.  I'm a ski instructor there (free pass, bar discount, why not?), and was hanging out with an actually cool PSIA level 3 instructor (who didnt have a stick up his ass about skiing, some do, like my assistant boss).
Just like others have said above, if you get the oppurtunity to be taught the right way to ski moguls, there's so many specific skills about edging, balance, and all that, that alone i would have never thought of that can be put into everything else we do whether its hitting the 60+ foot kicker, dropping 30 foot cliffs, or just skiing for ourselves all over the mountain.
Props for thinking about trying it out, I went from being a wreck trying to go through the moguls to looking like i knew what i was doing after just 40 minutes and from what would have been 4 or so lessons.
I ride either 05 or 06 rossignol scratch Fs', the purple and blue ones that unfortunately dont have tits on them. They seemed to work well enough.  If i ever tuned them, i'm sure they'd work even better.