I used XFCE with this exact theme for a few months and I loved it. The only thing I didn't like was that the light gray top "outline part" of the window decorat

I used XFCE with this exact theme for a few months and I loved it. The only thing I didn't like was that the light gray top "outline part" of the window decoration doesn't disappear when you maximize a window. I never figured out how to fix that.