I have a Gamut Lobster chair myself. Cost as much as a major system component but my thinking was that the listening position is as important as a component so why not spend as much? The justifications of an audiophile ... 🙄
The chair is comfortable and the head rest is sound absorbent so there's less reflection to the ears (based on what the marketing materials say). To my ears, I hear more details in tracks that I am familiar with. The more important lesson I have learnt is that you need to sit at the height of the tweeters. I learnt this the painful way as I recently upgraded my main speakers, and found that the chair was no longer in the sweet spot as the tweeters were not at ear height. Unfortunately the height of the chair is not adjustable. 😣
I had to relocate the Gamut Lobster chair to my second set up. Now I am on the hunt again for another chair. It is probably going to be height adjustable this time around.