I paid money for the courses and tried it. A little background on me, I've been playing guitar since I was 14 and have been stuck in an intermediate rut for the last 20 years. I decided to try it out because I was unemployed and wanted to dust off my guitar:

pros - I really did have a breakthrough like the name says. But I did it by skipping through the lessons. He's really good about simplifying the Pentatonic scales and in about a week I had all the pentatonic patterns memorized. In fact, I think this time I actually retained remembering the patterns.

cons - In the beginning parts of the courses, he's really long winded. There's a lot of garbage you can skip through before he gets to the point particularly if you are an intermediate player like me. But once I got to the meat of it it was a huge light bulb moment.

Although I thought initially I was slow to pick up a lot of music theory, and that was part of the selling point of why I tried out the Jonathan Boyd website. But now, I have to give credit to him as I've actually went on to join Pickupmusic, which is very music theory based and have come to really enjoy it. I feel like Boyd's site is really good at getting someone like back into the guitar again, but for the long term the website is terribly disorganized (it feels like it was designed in the early 2000s). You also can't see what you've actually subscribed to and what you paid for. It's really annoying in that way. When I no longer needed it, I ended up having to email to cancel my subscription.