We used Netfloor USA for a project at a regional university in the Cleveland area early 2014. It went very well. We installed the access floor ourselves but they had a site supervisor out during the install to make sure it went OK.
We are actually going to be adding more access floor in the next few months in some of the other tech classes and computer labs. They were nice to work with so I thought I'd do them a favor of writing a review.
We were surprised that it was so easy to install the floor ourselves. And our electrician installed the wires without any problems.
Power and Data Integration, Under Your Access Floor, in Less Than 2 Inches | Netfloor USA Cable Management