They're usually 2-10 times cheaper than their competitors, while providing better features, better design, and better support.
I love all of my Wyze devices and purchased another $100 worth of them just yesterday (3 bulbs, 2 sockets, 3 sensors, 1 camera, 1 SD card).
I like how they go out of their way to add features to their devices. For example, they provide a firmware for the Wyze Cam that turns it into a webcam, which I've been using for online education for the past few months.
For the past few days, I've done extensive research on smart watches and fitness bands. I looked into everything, from Apple Watch, Tizen, Pebble, WearOS, Fitbit, PineTime, etc. I haven't found anything with such a good value as the Wyze Watch. Some of the hackable nRF52832 based devices (PineTime, Colmi P8) have similar prices, but they have a smaller display, no SPo2 sensor, and you basically have to write your own OS (InfiniTime, WASP-OS, Zephyr, RIOT).
I'm really impressed. I wonder if there's a catch.