If you are just looking for a step by step explanation of screens etc, then they are a good source of information.
I don't have the M3 tutorials yet, but the Triton Studio ones literally went through screen by screen so are very detailed. But I felt it lacked in doing any kind of exercises.
For detail, they are excellent, but I would like to see some form of practical examples.
Sudosonic's Video tutorials are pretty good for someone who is hesitant to read the manuals.
Paul Duffey, the author, normally goes down through each mode and screen, talking about how to do stuff. He has created video turtorials on every Triton and Karma, so he is familiar with the Korg interface logic.
If you like the video demo clips, you will like the product.
I still think a comprehnsive and detailed video tutorial that explains, and shows how to use the M3's Karma 2 function is badly needed at this time.
The Korg Operation Guide along with the Parameter Guide, are OK, but honestly, I don't think they offer an intuitive way of how to use Karma 2, and what can be achieved. especially for a new comer to Karma 2.
We need additional and better, both written, or video tutorials for the M3's Karma 2 function, (how to use it in details, and how it integrates with each mode of the M3), with lots of examples, ....etc.
Hopefully, this wil be offered to M3 users in the near future.