Xiaomi's ecosystem covers an extraordinary range of devices at low prices, much of it re-badged from partner manufacturers. Integration quality depends on which sub-brand, which region and which generation you happen to have.
We use the Zigbee half without reservation - much of it is Aqara anyway. For Wi-Fi devices we integrate what a client owns and avoid specifying more, because the regional cloud dependency is a fragility we would rather not design in.
We do not sell hardware or carry brands. Bring your list to a design session and we will tell you what is worth buying, what you already own that can stay, and what to skip.