If you are comparing Sihoo M57 vs Musso E600 Pro, you probably want a chair that feels good during long desk hours without spending a huge amount of money. I tested both chairs in my home office in the USA. I used them for work calls, writing, web browsing, and late-night editing. Both chairs focus on ergonomic support, but they feel very different once you sit for a full day. One feels more breathable and work-focused. The other feels softer and more padded. After weeks of u