This is a good version of Othello a.k.a Reversi, and I like the simple yet elegant OS X brushed metal interface.
Only three minor things bugs me:
1) There is no option to turn off the sound (the "blip" when you move a piece gets annoying).
2) When "3D Animation Effects" are turned off in Preferences and the interface changes, the icons which shows the score remains the same when they ought to change accordingly.
3) The button which says "Tack Back" should of course say "Take Back"...