How well does the PS4 controller work on PC?

I don't own any consoles or controllers at the moment, but lately there have been some good games on steam that people are saying work best with a controller (dark souls, guacamelee, dust) that I've been thinking about trying.

There is a good chance that I will buy a PS4 at some point, and there is a lot of praise going around for its controller, so I was thinking about buying a PS4 controller now and using it for some games on PC. However, I've read that there are some key mapping issues involved?

I know some of you guys already have your PS4s, would you mind clarifying this topic?

I courteously direct you to this thread on the main General Gaming section.

Noice! Thank you.