Here is the pic of the PC I used when I was last there:
https://pbs.twimg.com/media/CNxngbGU8AAcNjT.jpg
The keyboards are 'meh'. I'd really recommend bringing your own unless it's somehow not better than the ones there (Despite having "blue" switches of some sort, they felt pretty crappy).
Mousepads are fair sized, but most people probably use bigger ones at home (Mine is a little larger).
Mice are ok, but bring your own.
Headsets are 'meh'. I would bring mine, but I probably won't since I don't absolutely need to.