Has anyone used VoltRank.com link exchange?

Dear all,
I had a new website and would like to do some link building, including link exchange. Has anyone used VoltRank.com? I read an article regarding the services they provide(http://smallbusiness-plan.net/voltrank-link-exchange-review/). Not sure if it works. I had a little doubt. They have decent traffice according to Alexa. But the homepage PR is 0. This is odd. They can build links for other sites. Why their own PR is 0?
Any thoughts?
Has anyone used VoltRank.com link exchange?

See original post by b2net