I also use a pair of the leather version of the Poang chairs. I originally used the cloth cushions and maybe that is geoffkait's objection? The leather surfaces don't absorb any sound. At least to my ears they sound better than the cloth cushions. Maybe I just like the leather better and have a bias.
My friend who comes over frequently, prefers to remove the head cushions. He claims losing those improves the sound. I don't hear any difference. We're all different I guess.