I got 1g of MDPV off some guy I know, the first time I got it it was really good stuff and had a very strong taste and was crystal white. I got some today, tried some and there was no taste whatsoever, it was a white/brown colour and looked very smooth compared to the last. I snorted the usual 10mg and there was no effect at all, I've messaged the guy on Facebook asking whether he's given me the right stuff, and I am not taking anymore because of the small dosage needed. I doubt I have built and tolerence to it yet as I haven't taken any for a two weeks.