I tried it once ages ago when I started 3D. It doesn't really do that much, just posing a character, adding clothing, hair, rendering. I don't think you can actually model a character (maybe I just didn't find out how) but if you're interested, there is a similair program called DAZstudio that is free, but you have to pay for the content or make it yourself.
C. P. U. Its not a big processor... Its a series of pipes!