I've been a member of SBL and it's honestly amazing if you have the dedication to really take advantage of it.
My issue, and the reason why I liked SBL, is that when I'm in the mood to learn new things I generally pull up youtube and start working on something, only to go down a rabbit hole and start chasing "shiny objects". I might start out with the idea of improving my slap technique and then before I know it I'm watching a video on Marcus Miller and realizing that I'm not anywhere near ready to take that on yet.
Because SBL has courses that are designed to bring you along slowly, it sort of takes that issue away, for me at least. It's very comprehensive, and there are sometimes when I'm a bit advanced for a specific lesson and I might skip ahead a bit, but in general I go at the pace of the lessons.
SBL does have a ton of content, so sometimes I found myself popping around taking multiple courses at the same time and at times I found that I wasn't really pushing myself to retain the information as much, so I opted to cancel my membership and now I just purchase the courses that come out that I really want to focus on. For instance, the Fretboard Mastery course, which is going on currently, is great and if you keep up with it the new lessons will come out weekly and allow you to keep up with it. Again, this is great for me because I can't skip ahead and it forces me to really concentrate on the lessons for that week.
It really all depends on how things work for you, but you'll never run out of content, the teachers are great, the information is organized and it will 100% make you a better player. There's a 14 day trial so it's worth it to give it a try at least.