I wouldn't say I'm significantly better, I am better though. Experimentation has been crucial because now I know what helps me and what makes me worse, it's a lot of important information that allowed me to narrow down my possible CFS causes, without it I'd probably deteriorate real fast. I also found some supplements that helped me with other issues, so that's a bonus.
I experiment mostly with natural stuff like diet and minerals, vitamins, herbs, what you can buy without a prescription, so it's nothing like strong prescribed medication, I wouldn't want to experiment with that too much, if at all. I didn't experiment with CBT or GET. One thing I noticed is that reactions can change with time, some things that made me feel worse or even made me crash in the past are now perfectly fine, probably because I was going too fast or something else was missing, so it's a continuous learning.