I think some (maybe vim experts) jumped a bit too quickly to vimtutor. In some regard, I agree. But I tried the initial exercise on my 8 year old and was impressed, so I purchased to have access to the rest. I'd say I'm a sub-par intermediate vim user - knowing enough to know that I don't know or use the true power of vim day to day, but have memorized a few "tricks" that seem to impress basic vim users. Hoping I can leverage this to break a few bad habits I've gotten into. Nice UI and I think the pricing is fair. Hopefully the content expands, but even if the service isn't around more than a few years I feel like the $15 will have been worth it. Nice work!

Edit: question for Kenneth - do you plan on expanding the content?