I agree with all of the above comments? with one exception, this was my first extender and I fell for the hype about the more expensive ones and spent way to much money for the same product with different packaging.
I ended up come back to this extender because it is the most versatile. The rods are way to short so order a M4x0.7mm threaded rod from Grainger. Now you can cut any length rod needed ($3 for 36" rod). Also, secure the rods with purple or blue LocTite (not red).
This system gives you 1.3? of adjustment, other systems only give you 3/4? adjustment. If you are a grower (not a shower) you need this extra adjustment.
One last point, if you are mechanical, you can make additional extension bars to give you 2? of adjustment, this is my current set up.
I did purchase some foam that goes over the noose, I find this the most comfortable.
Good luck and stick with it. Go slow at first, one hour long sessions, and work up to 3 hour sessions.