if you use it carefully, you can make some nice shapes out of it. If you want more details, pick something I've done in my [url=http://www.c312.deviantart.com:fe429]deviantart gallery[/url:fe429] and I'll see if I can remember how I did it and explain it.
that was orgininally a render with all those blocks. Then I just went along each one with the lasso and made it a new layer which makes it look vectorish. That was easy too because it was all a bunch of straight lines around the sides of the rectangles.