★★★★★
I agree with all the other posts so far- so I won’t reiterate these things. What I appreciated most with the lessons was Gregg’s willingness to cater to individual interest and make progress in areas/subjects that you are into at the time. It made learning enjoyable because you, as opposed to a rigid series of topics/lessons, influenced what you learned each week. That said, expect to be a well rounded player, as Gregg seems to make it all relevant and interesting.
I took roughly 7 months of lessons with Gregg as an absolute beginner and would certainly recommend him to anyone new to guitar. Based on his knowledge of the instrument and the other reviews here I think experienced players will be satisfied as well.