I'm 63 and no I've never used B/Tmix, but I don't think anything comes close to them. They are in their own league from what I've read, although there is the potential for psychological dependency. I would say that PT-141 makes about a 10-20% improvement and took the quantity, quality and speed of erections from pretty good to noticeably better. I know that is a highly subjective judgment but it is in the well-worth-using category for me, but so are, for example, Nitric Oxide tablets, HIIT workouts and DHEA. BTW, I use MT-2 in the winter and PT-141 in the summer.
