A pretty good deal for an Android smart watch. The reviews are generally good. Not the latest Android operating system, but still very functional and it may get upgraded via OTA at some point.
Some will see the size of this watch as a disadvantage. But I've had a smaller/standard size smart watch for over a year and I actually want a bigger screen size now. Finding Wi-Fi and GPS on a smart watch is reasonably rare also. Plus this has a big battery which should last some time. My current Chinese smart watch lasts about five days in standby, heaps longer than the Apple watch, which also doesn't have a phone built in.
Having a phone sim card slot, to operate the watch as a standalone phone, is really useful. My current smart watch has this facility and I use it for close friends and family to reach me. All my business calls still go through to my standard phone.
Finally, a pretty decent camera resolution on this watch. Most of them are 0.3 megapixels.