I had no experience using one of these but it still worked out great. Price was great too.
I found that using this die with the traditional truss rod was a pretty heavy cut. I had trouble getting it started so i tapered the end with a belt sander. Then when it was on, it was easy to cut the threads
The die works well, you should have a cutting die tool to mount the die in for best results. It is difficult to start with just a wrench.