It has the downward teeth, but it can still get stuck sometimes. When I go slowly, it doesn't seem to happen. The sander does turn slowly and I stand next to it, just to be sure :)
Thanks, I've never seen those before! Only, the one on the picture is $177 :p I'll look into that.
I have a Dremel and while it is very useful, it cannot cover larger areas evenly like the sander and cut straight and deep like the jig saw. Those were important reasons for me to start fiddling around :)