I use the tension rod to hang a blackout curtain. Attaching the curtain was a breeze. The tension rod fulfills its task perfectly for three weeks. I have so far found no relaxation of tension.
The tension rod itself acts stable.
Shortcomings
======
The gray rubber bumpers spoil the visual impression. They are convenient but not fancy.
The two part-rods of the tie rod have quite a lot of game against each other, so the outer rod is not rigid in the tightened state.
