One of the advantages of this being on a forum is that you can ask questions and talk to the person who wrote the evil article if you chose to. I'm even doing it at 6:15 so you'll be pleased to know I'm not being paid for this.
The "not mixing paint in the cup" is an oft-repeated piece of wisdom. Yes, you can get away with doing it, but that doesn't mean it's a good idea. For a start, the paint cup isn't very big. Larger jobs will require you to fill it up more than once so a separate pot full of colour is a better idea than trying to accurately repeat a mix in the cup. When weathering, this might not matter, for top coats, it will. Next, the chances are there will be some unmixed paint at the bottom around the needle as the mixing tool won't go down there. Finally, whacking the needle isn't too clever. OK, the chances of damage are slight, but someone will manage it.
FWIW, I like this set. It's a good step up from an external mix splatter gun for a start. Maybe it's not the setup I currently use, but then my current airbrush alone cost more than this package. I'd happily weather stuff with this set though and with a little care, do all my painting. The compressor isn't noisy (yes, a video would be a good idea), certainly no worse than any other.
The thinners aren't included in the set and those shown are only really appropriate for Lifecolor paints. I thin enamel with white spirit and acrylics with cheap car windscreen wash as suggested by military modellers. The tape is really good though.
Hope this helps.