I have also gained a great deal from the fundamentals courses. I played guitar for about three weeks when I was fifteen years old and then I quit because it was "too hard". Really I was just an impatient teenager back then lol.
Fast forward to a month and a half ago, I'm 40 years old now and guitar is still on my bucket list. I dug my old guitar out of storage, started Lisa's courses and I'm aleady able to play one of my absolute favorite songs (Half the World Away by Oasis) and I'm nearing the ability to play numerous other favs as well. The chord change strategies were of monumental value to me and the basic theory as well. I'm thoroughly enjoying this. Thank Lisa!