After snorting another 20mg earlier, I noticed increase in positive stimulation, as well as very mild visuals and slight empathogenic effects that are far weaker than MDMA or even mephedrone, It does feel pleasant, at least as much as MDPV and maybe more. The euphoria was quite noticeable. I've got into a headspace that is a little strange, but not quite psychedelic. I could function just fine in this mindstate. The visuals and slight weirdness have come on in the latter half of the experience.
It is starting to wear off, but not close to being gone. I think a duration of 6-7 hours seems reasonable. Everything is slowly subsiding.
I'll try MDPPP in the morning snorted in several small doses and see how the 3 compare. I'd say MDPV is 3-4 times as potent easily, though this may be more pleasant.
Can't wait to see how MDPPP compares to these.