I hired "Just Hang" to come to my office and hide all of the wires on and under my desk. I have a modern style desk that's completely open. The design of my desk doesn't provide any type of wire concealment options at all. As a result, I had a huge rat's nest of wires, power cables, monitor cables, USB cables, speaker wire, etc. It looked really ugly and unprofessional (I should have taken a "Before" picture).
They sent 3 guys to my office. I was a little nervous when they started drilling holes into my desktop but everything was done very carefully and professionally. They even used masking tape where they were drilling holes to prevent the wood from splintering (I think that's what it was for anyway). They were somehow able to hide all of the wires up under the desk so that none of them can be seen from in front or even behind the desk. Everything was zip tied or run through conduit under the desk. They even mounted 3 separate power strips under the desk.
The final result looks amazing! They worked very hard for 4 solid hours (on a Sat). They were clean, professional, knowledgeable, and efficient and I would recommend them to anyone who needs any type of "wire management." I have not used them to hang any TV's but based on the job they did at my office, I'm sure they would do an amazing job at that too.