Yeah I have had crazy experiences from some 15x I had a while ago. I had 20x since then and it was like 3x in comparison to the 15x I had. Yeah I went as far as I ever want to go on it lol but I really wanna get some good stuff again.
I usually like 25x. I have tried 35X extracted onto white sage before, and I would have to say it was a little too strong for me! 25x got me right through that portal without the discomfort the 35X gave me. I don't purchase my Salvia extract from stores around here, because the number of "X" doesn't really mean anything, and most conveinience stores and my area sell bogus salvia and the bong stores are too expensive.