Sonos built the best multi-room experience in the business, and the speakers sound excellent for their size. The reason for the rating is history: the company’s 2020 privacy-policy change drew widespread subscriber backlash, according to coverage at the time, and its cloud dependence has caused outages that bricked functionality users had paid for.
If you choose Sonos, you choose a platform relationship, not just speakers. Many people are happy with it; privacy-first buyers should read that 2020 episode first.