We have used Shields as our sub for every single wiring project for every newly constructed or retrofit data center delivered to our DoD customers for nearly 10 years now. Fiber, copper, open secret, SCIF, shielded, plenum, you name it, they delivered it. Every job is custom and their work is truly second to none. Will they be cheap? Nope. Will they exceed your expectations? Yes.Whomever wrote that 1-star review needs to provide details, but Id bet its a low priced junk competitor.