Is Xpanse Ergonomic chair any good? Specifically LS999 Pro model

Currently looking for an ergonomic chair for my home office setup. As I'm working from home 95% of the time I feel I need an ergonomic chair as I'm recently suffering from back aches. I'm currently using a regular dining chair as my chair in my setup.

Asking the question here because I've tried looking for reviews specifically for the Xpanse LS999 Pro model but most reviews only talk about the Xpanse LS900 model. Based of the specs sheet this chair seems to fit my body well... although I have yet to try it. My weight is 40kg and my height is 166cm. Hopefully someone can tell me if this chair is any good and worth buying.