MDPV just didn't interest me that much even though I tried it for the first time already in 2007. Never got any compulsion to redose, and if I went higher than "a little instead of coffee", it was just off-putting having to walk around the park with chattering teeth to try to wait until the nervous straining energetic stiffness left after a few hours. But when I sold what I had left to a friend, it didn't take long until his girlfriend had to pick him up hiding in a forest in the middle of Sweden, with his hard drives taped together and carried in a plastic bag, the car crashed by the roadside, because "the operators" had communicated to him that they were going after him as well, not content with using him as bait any longer, all through the incessant and obviously algorithmic tappings on his 9th story window. I am lucky, I guess.