Really glad Libernovo is keeping bigger guys in mind.
6'2" and 300lbsish on a good day, and I've tried a lot of chairs. Even a lot of "XL" chairs don't feel comfortable, they just feel "big". I still haven't found many that fit properly across the upper back, and headrests have always been an issue too(except some aftermarket ones I've found)
For me personally, wider shoulders have always made narrower backrests uncomfortable, and headrests especially for me matter, but I always need to jerry-rig myself or buy something aftermarket to be able to support my head.
The Libernovo Maxis looks like it gets lot of things right. I wanted to like the Omni so much after seeing how hyped it was, but obviously It didn't fit me very well. Maxis looks like they've taken all the good from the Omni but made it into something that can fit me properly.
I'm currently using an Embody Gaming with an aftermarket headrest and don't really have any major complaints with it, but I still ended up putting down a deposit for the Maxis because it really feels like it was made for people built like me. I opted for the airflow version too because seat ventilation isn't something I've seen before and we don't need to talk about that but that's something I could use for sure.