I have been doing it off and on for 8 years. Long term consequence is that I am just over 1.5” longer than when I started, about an 1” larger in girth.
I do have two areas on my unit that are more susceptible to fluid buildup from jelqing or pumping if I work my unit hard. I can firegoat role the fluid away within several minutes.
Currently my unit is a little darker than when I started, however that is because I am currently still pumping and not giving my unit a chance to bleed off the coloring from my last clamping phase. I have taken brakes in the past and my unit has returned to very near it’s starting coloration.
I am more veiny than when I started, but not with any veins that are problematic or balloon.
My LOT is lower than when I started, I typically last much longer during sex, unless it has been a long time and I don’t care if I blow faster.
I have not seen any long term negative effects from my growth or what I have put my unit through. I am still actively doing PE so that may cause some possible consequences to not show.