Also have the Netgear with plug-in rear camera. Has worked well for the last 4 years and has decent video recording. Would suggest a high capacity memory card.
Having used it on MB Allspace and Touran using dangling lead to cig lighter socket, it is now powered through a short, unobtrusive usb3 to mini cable from the mirror housing socket mentioned above, which is part of the Kodiaq’s aptly named “simply clever” features -brilliant and absent on other VAG brands.