I have also used the mac version for a while and it never quite clicked for me. I used Bridge for over a year to view and quickly edit and sort photos...but Lightroom while it had nice features was slow for me and I was not satisfied overall. I found Aperture (mac only) preferable but I'm not going to commit myself to it at this point, considering that more and more options will become available shortly. Personally I'll make my decision after Nikon View Pro becomes available and I try it out.