I just absolutely hated MDPV--I guess I generally don't like DAT inhibitors, just substrates of the amphetaminergic variety. But I wouldn't be willing to touch mephedrone with a 10m pole--it seems short-acting (hence quite addictive) and a potential cardiotoxin.
For "legal-ish" (not technically legal, but I've never heard of anyone having big problems) stimulation (especially if you just want to be able to stay awake in mission-critical situations), modafinil is a great option. In some places, the pro-drug adrafinil (N-hydroxy-modafinil) is a cheaper option, and I assume that could work as well.
Edit: I'd still like to try desoxypipradrol. Even though it is a DAT inhibitor, it does last a long time (I like compounds that stick around for the duration) and it sounds like the nuclear bomb of stimulants.
mdpv is paranoia heavon for me
