MDPV is not so bad if you know what you are doing, i find it is actually a very good stim to use in very small doses when you need to stay awake for long periods of time. I use it once or twice a month in 5-10mg doses.
I think most people get into trouble because they dont read up on the dose amount and treat it like coke, and i can tell you from my experiances that if you did do a line of this stuff the same size as even a VERY small line of coke it would really fucky you up, and i could see that kind of dose leading to alot of the stories posted in the news.
If you stick to small doses though its fine, i bought 1 gram of this stuff over a year ago and have over half left, so not addicting AT ALL when taken in moderation.