Jan Stedehouder used PC-BSD for thirty days to see what living with it is like. On day thirty, he concludes:

Does PC-BSD have the potential to be a serious contender for the open source desktop? I answered that question with a yes, because the potential is there. The solid FreeBSD roots, the very strong and very accessible information, the friendly and mature community and the PBI system provide the foundations for that potential. I don’t think it is ready now and I couldn’t recommend it yet to someone in the early stages of moving away from Windows to an open source desktop. But I do think that the PC-BSD team has the right target audience in mind and is building an system and a support system that addresses it’s needs.

He has now finished that journey and he’s going to do the same with DesktopBSD from Nov 1st.

Check his website for the daily updates.