I took 102 and my wife took 101 (I sat with her and helped her through the lessons). Here is my take.
101 - This is a really basic class aimed at beginners. If you're just starting out, this class is for you. You learn some chords, some chord progressions and some rules about social playing. You also learn how to chunk which is a hugely valuable technique.
102 - This class is to prepare you for 103. You learn a lot of the techniques that are helpful for arranging (hammers, pull offs, etc.). You learn the theory you need (scales, how to know what chords are in which key and some ear training). I would say this class is for you if you're somewhere between beginner/intermediate.
UUU breaks down to about $15 a class. $15 for a one hour sessions is an incredible value. The course content delivers what you need to know and Aldrine is an excellent teacher. If you've ever watched one of his free monthly or live lessons you'll know what I mean. Watching and hearing him do the techniques as well as explain them is incredibly helpful. You also are given homework where you can take a video of yourself and he will give you feedback. There is a midterm and a final where you do a video that demonstrates you understand what you've learned.
Admittedly, receiving feedback from Aldrine was sometimes slow. He's a busy guy and I believe there were some technical difficulties with him getting email. I imagine his inbox was flooded with requests and videos so I imagine it was challenging to make sure you viewed and commented on all of them.
All in all both courses were solid. I had no complaints with what and how things were taught. Keep in mind that you get what you put in to it. If you practice and pay attention to what he is teaching, you will learn a lot.
I hope that is helpful. I'm happy to answer any other questions if you have them.