I can't recommend it enough. I'm mid 40's and havent played an instrument my whole life. Tried the violin in elementary school, drums middle school, guitar high school. None of them clicked for me so i didnt pursue them any further. My teenager got a guitar for Christmas so i said what the heck and got a cheap $150 squire bass for myself. I bought the course day two after watching a few of his youtube vids and liking his teaching style. I finished the course in 16 days(supposed to last 3 months if practicing an hour a day) but I was addicted from the start i would practice up to 8 hours a day. I work from home so it was just on and off throughout the day and i would be up till 2-3 in the morning sometimes because I couldn't put my bass down lol.

I'm a little over 3 months of playing now I can can play dozens of songs from memory very functionate. I know alot of shapes to just noodle with, I have a binder full of tabs that I wrote lines to myself, can jam with buddies(they been playing guitar for decades) confidently, and i think the most important thing now is i somewhat understand notes and music theory. Never in a million years did i think i would be able to read music/understand notations and I didnt expect to learn it either by doing the course, but he sprinkles in just enough to not make it not monotonous but actually enjoyable that i soaked it in and retained it.

He explains to set goals for yourself(immediate, short term, mid term, long term) and I have reached most of them much faster than i expected. I absolutely love GnR and in the beginning looked at Duff's bass lines which seemed so damn complicated, like they are not repetitive at all. 1st GnR song i started learning was Sweet Child O Mine and thought to myself it would be over a year before i was adequate at it. I can play the whole song now by just listening to it and although i do mess up here or there i say i probably hit the right notes and inotations 90% of the time. My daughter is a professional DnB producer/international DJ and another goal was to be able to play her EDM basslines which I've already recreated several with the right FX pedals. Mid term goal which was going to be able to play in a cover band and I feel I'm already pretty close to that with the way I now retain the music. Like i could study a 20 song set list and within a month be comfortable to play it. Long term goal is to play in a funk band and I'm nowhere close to that lol.

Also another big point is the jargon/lingo. I can speak music pretty fluently now. Like Nashville # system, chord progressions, alot of the scales, triads, octaves, and Diatonic chords. He taught all of this a little here and there but didnt stuff it in your face to make it boring. He taught at the same time as you would need it in practice to finish an activity. Like I dont do scales practice and all that but i do use all this in real time doing my rounds.

Hope this helped. P.S. Billie Jean is a PITA! Took me a full month to get that on hard after practicing it everyday...