Has anyone tried to integrate with any Chinese intercom products?

Hi all,

There seem to be a good number of cheap yet reasonably polished solutions on Aliexpress, for intercom hardware that enables video and 2-way audio for greeting and appraising guests while you are away from home - I personally would focus purely on those that work with mobile phones.

For those of us who like to assemble a solution as much for the challenge/fun as the end result - something like these might well appeal for helping form an automated solution that would allow guests and couriers to safely gain access to our home while we are away.

Has anyone tried with these cheaper products? I imagine even wiring a few arduino pins into the external button would be enough to achieve some good automation - but hearing about some experiences/designs/warnings would be great of course!