I just bought the Mirra 1 two weeks ago to replace an aging office chair that I'd picked up without much thinking in a furniture store for ~200 Eur. Recently I felt that my back was not feeling that good anymore after longer coding sessions and started looking for an alternative. Being a single indie dev, I didn't want to spend around 1000 Eur for an Aeron but then I stumbled upon a used Mirra in good condition (around 300 Eur) and picket it up. It is an absolutely great chair, way better than my old one. I'm really impressed with the quality of this chair.