I attended the first online version of
Geoff Lawton's course, and at the
Spirko discount, found it well worth the money (around $700-800). It included an Earthworks course, and the hard copy DVD's afterwards. If you kept up, your Q&A's were answered in video followup.
Graduates had access to the 2nd season, which I noticed even more Q&A's added to the course.
My friend joined the 3rd season and I was able to see that -some- video updates were added (the animation everyone likes) and even more Q&A videos.
Then some more seasons (2.0?) that I did not have access to and have not comment.
For this year's course, I did hear an interview "recently" from Geoff Lawton (not sure which podcast I heard it from) but according to Geoff, they have apparently overhauled ALL the videos. Animations galore, drone footage, etc. He said they wanted every concept visually & clearly described. The Q&A videos number in the 100's now. (To editorialize, it sounds like they finally got it to the vision he has for it.)
Is it worth the cost? That's really up to each person, and not really the point. Buy
Bill Mollison's book for $90 and study each page for a couple years, and apply & observe these principles in projects around the world for 10 years and be awesome. Or speed up the process and pay someone who took the time and effort to create a learning scenario.
One thing I would point out from previous comments, though, is that there is a difference between going to a hands-on course vs. going for a certificate. The first will probably be catered to your climate and you can apply to your property right away. And the latter is going to cover more abstract concepts that seem pointless at first but in the end will make you more adaptable to any possibility that might come up because you actually studied design science.
I don't know the exact cost of this new 3.0? version of Geoff's is. $2k? It seems to be professional & exhaustive
enough now that it is catered to those that want to take that certificate and make it their business. A business that makes money. And that's why it's priced that way. No different than the theory behind paying tuition at college (the idea is that the degree will make your future income higher) or why sales conferences can cost $10k , 50k, or even more (if it raises you yearly sales by > $1 mil then it's worth it)
I highly suggest whatever you choose is in-person & costs money. You are going to be more alert, pay attention, finish everything, and of course meet great people.
Free stuff or online courses are rife with quitting. The number of people that never finish their designs online is staggering (and sad)