This door anchor actually makes a stable impression. However, the seam broke away in my case, after more than 6 months on the fixing aid. I had discovered it fortunately in time before the seam EVT. Completely torn during exercise execution and me the Tube would be shot in the face. But this I must also say that I have used the door anchor with a blue tube (extra strong). I'm guessing the material / processing this door anchor is rather designed for light / moderate load.
