I just got one about a month ago (strangely the same time I started doing segmentation/intarsia) and I have to say I love it. It accepts bits from my dremmel tool pack and makes sanding over edges a snap. My first segmentation project I sanded by hand as my dremmel was way to bulky to do it effectively and the second project I used the rotary and it was a night and day difference. The foot pedal is great and the tool is very easy to hold in your hand like a pencil. Bits also can be swapped out in about 5 seconds. My only con I have so far is the quick disconnect for bits. When you tighten the bit by torquing the tool in two different directions, it is loose when locked and tight when open. Just seems like it should be the other way around, but it doesn't interfere with using it.
If you end up getting it I hope you enjoy it.
Cheers