I have two different ones. An Akaso V50x and an Apeman A87. Both are quite good.
That being said, you can get used gopro hero 4 blacks on ebay for around the same price.
I personally plan on getting two more Akasos, since I'm quite happy with how they work, and the feature set.
The v50x does 4k 30fps. The Apeman does 4k60, but I prefer the colors of the akasos.
Also, I can't seem to get the wireless control to work on the Apeman cam. It's not a huge deal, as I use that one as a dash cam mostly.