I have been using Nugget Busters and Gray Ghost since they came out. I just retired my old set of Nugget Busters for the new NDT. All of the DP phones are some of the best I have ever used in an affordable category.
I had a couple of issues in the past with cabling was all I ever complained about. Using mine now with a Wireless unit and planning on cutting down one of the NDT cables to a short lead into my receiver, tired of snagging cactus.