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Pro Reasonably priced
At $120, this camera is much cheaper than similar models.
Pro Waterproof case (30 m)
The camera is water resistant at depths of up to 30 meters due to its waterproof housing.
Pro Substantial battery life
The 1000mAh battery lasts for about two hours while shooting 1440p30. Charging the device then takes two hours.
Con Field of view isn't correct
The camera lens is only 190x360 degrees (instead of the 220x360 claimed) and only 180x360 degrees can be viewed without distortion. This is from an in-depth review of the Amkov_AMK100S by Jan-Markus Rupprecht, which you can find here.
Con 4:3 square format leaves large black areas
Videos are 1920 x 1440 pixels and include large black areas around the circular image. Even below the circular viewing area, there are unused black areas. The effective image area is therefore only about 1.5 megapixels in videos and in photos it is around 4.5 megapixels.
Con Control LEDs on the camera not visible to user
The LEDs have a white-translucent plastic front and appear simply white in daylight, whether they are lit or not. However, the silicone sleeve shades the LEDs, usually allowing for no direct sunlight to fall on it. In addition, the viewing opening is limited only to a few degrees, so you often cannot tell whether the camera is running or not. In this case, the user must rely on the smartphone app.
Con No additional (removable) protective cover over the actual glass lens
Since the lens protrudes from the housing, you should be extremely careful during transport so not to damage the lens.
Con Watch-type remote control not available separately
While the watch remote and camera are available for purchase as a bundle on eBay (their own store), the watch remote can not currently be purchased separately.