Some points to note:
Autofocus is a little slow, slower then other pocket cameras etc. With the GoPro theres no autofocus - everything is already in focus, but you can tap to focus with the Pocket. This can be difficult using the small screen as you can see whether your subject is properly in focus on such a small screen, but its much better when connected to the smartphone app as you can set focus much easier.
The GoPro uses the entire image to set exposure. With the Pocket it tends to use the centre of the image to set exposure for the entire image. This can be a good or bad thing depending on what you are shooting.
ActivTrack works really well, within the Gimbal constraints of course. You can set an object easily by double tapping on the display, or by drawing a box around the subject when using the phone app. Tracking works really well.
In selfie mode FaceTrack works brilliantly. Locks on straight away and stays locked. It can track 2 faces at the same time but sets one as the 'master'.
ActivTrack and FaceTrack DO NOT work at 4K/60.
Frame rate must be set to 30fps when shooting in 4K and using these features - or you can use 1080p also.
Audio is pretty decent for a unit of this size, but with loud surroundings I notice a lot of audio clipping. Need to test an external solution...….
All gimbal modes work nicely, and the menu system for switching modes etc is really simple. The swiping gestures can sometimes get irritating when you are swiping one way and another menu comes up, and takes a little practice to perfect, but otherwise all good on that front.
Phone connection works perfectly, but bear in mind if you have a thick phone case the connector may not reach! Once connected the image is displayed nice and quickly.