Check out his free stuff first and see how you like his teaching style.
I paid for his Guitar 101 course and ended up paying to be a VIP member to join in on the live lessons too. His best course by far is the 10 week Master the Fretboard course which is all in 101, but hand fed to you over 10 weeks which forces you to get all the information in the right order.
I highly doubt that you'd want a refund, like I said before, I've checked out a few online teachers, and I think Charlie is the best there is.