Favorite Covert Camera And Why?

I'm curious about covert cameras... I have currently selected a Brickcom and client would like to be able to move it around to other locations.

So I'm curious if anyone has a favorite/preference and why... what draws you to that particular brand for example.

We have tested a few:

Testing Covert Cameras

Samsung Covert WDR Camera Tested

Axis MP Pinhole Shootout

I am not sure if we would say any is a favorite.