Xiaomi's Smart Band 9 offers a great entry-level wearable experience with accurate sleep tracking, fitness metrics, and a small, lightweight design. However, it may not be the best fit for those with smaller wrists due to its tendency to lose skin contact, and its small display can be difficult to navigate during intense activities.

Source: https://www.zdnet.com/article/the-smartwatch-with-the-best-battery-life-ive-tested-is-also-one-of-the-cheapest/