They were inexpensive and reasonable quality. They're certainly not the same paints as the Shinhan Premium paints that I have and the term "Professional" can be a bit misleading.
I don't regard them as being any better than a decent student grade paint. In fact I would say my Van Gogh student paints are slightly better.
The colours of the Shinhans are a bit strange when compared to the same colours in the Van Gogh range.