I actually wouldn't be so enthusiastic. I am mostly in Taiwan and Xiaomi has largely expanded here so I have a lot of experience with their products. They're so cheap I've got a pile of them from Xiaomi cameras, the tablets, routers, wireless dongles, phones, and even their smart weight.
A few problems I've observed with their Android devices which has made me much less enthusiastic. For example, you'd think that MIUI 7 is Lollipop and that since it is available in most MIUI devices that you're covered. Actually, with the exception of two latest devices, they're just reskinned older versions of Android and often poorly optimized at that. On the Mi Pad for instance, MIUI 7 is still 4.4.4 reskinned and missing a lot of features. If you've got a Xiaomi device, you are not likely leaving your current Android generation, ever. This is true for all the Xiaomi smartphones. They also have bugs (including security) that are never fixed resulting in their ban if you contract for the government in many places in East Asia. The much touted monthly updates are for very minor adjustments.
You might say, "But there's third party roms". Here's the kicker, Xiaomi never releases sources nor the kernels for virtually all their devices, even years later. So third party roms are better but will never be fully optimized and many will still run poorly versus the roms on other devices. So again with the Mi Pad and older devices of Xiaomi, they are stuck with much older versions of Android.
Then there is problems with MIUI itself. Yes it looks pretty on the outset but if you're running on a first party device, guess what? There's no apps allowed on the SD card. So if you get a Xiaomi Android device with 16 gb of memory, none of that will be migrateable onto the SD card. Each variant has a major bug or two that is never fixed.
Finally there is the fact that a lot of their hardware and software is buggy for their accessories. The Xiaomi Yi cameras are buggy, with frequent disconnects and setup problems. We purchased 6 for the office and only one will connect reliably. The rest are just gathering dust.The US versions are slightly better but that's been a year of development in between. The wireless dongle barely works. The smart weight doesn't connect most of the time so it is quite useless. The Mi fitness band is actually a good product for the price though but that's far from what is needed from an Android device. The Piston 3 earphones and battery charger are fantastic devices however but they're not smart devices. In the end I'd be a little wary, a lot has to be seen.