One important thing that you get with the subscription, which could be harder-to-impossible to find free, is a progression of instruction. A 10-day series might

One important thing that you get with the subscription, which could be harder-to-impossible to find free, is a progression of instruction. A 10-day series might remind you just in time about some detail you were forgetting, or provide insight on a difficulty you're likely to have encountered, or introduce a new technique and guide you through simple->full versions of it.