I had never heard of these before this thread. Having a daughter whom is very artistic - I was quite intrigued. We bought her a 12 pack for her birthday and she was blown away by the difference. She started doing a few drawings and posted her first YT video. She then took her own savings and bought a 36 pack as she was a bit limited w/the 12 pack. Another case of you get what you pay for. These are really cool - the feel in the hand; the storage cases they come in, the numbering system which tells you how well they blend w/other colors, the ability to push the ink across the page - just super super good stuff.
Shameless plug - here's her 3rd video: