I've had OD since pre-Beta (actually, since their OS/2 days).
I usually run WindowBlinds, DesktopX, and WindowsFX, and I install most of their utilities. (Object Edit, Object Zip, Association Wizard, and System Tweaker(?) are all useful as well.)
Performance on a PIII-866 w/ 196MB is quite adequate--but this is a work system, not a gaming system, so my requirements are not as steep. I do run RC5 24/7 though.
I like it
--Woodie