Groove3 is having a sale that takes the yearly subscription for all videos down to $90. Not the lowest I've seen it, but pretty good.

They've got a huge amount of S1 training content, and the non-S1 content is really good too.

I have no relation with the company, except as someone found their training (along with Studio One Expert) to be invaluable in getting up to speed quickly. S1's power is in its consistency and key/mouse commands. If you come from a DAW with 1000's of menu options, you could believe that it's missing a lot. Without the videos, I probably would have gone back to Cubase. (As an aside, I had a chat with a friend of mine who is a long term frustrated ProTools user, and he experimented with S1, and gave up, because he believed that S1 was missing really basic stuff.).

Mods, if this is out of line, feel free to remove.