Before buying a random rip online, check that all 20 volumes are included and that the audio sync isn’t broken on the later discs.
Here’s a review for “Learn Master Guitar Complete - 1-20 - DVDRip” , written from the perspective of an intermediate learner who has used the course.
Let’s start with what matters: content. Twenty full DVDs worth of lessons means you are getting of instruction. This isn’t a “learn three chords in a week” course. It starts at absolute zero (how to hold a pick, name the strings) and aims to take you well into intermediate/advanced territory (modes, advanced fingerpicking, soloing techniques, music theory applied to fretboard).