Yeah i must admit to being dumb enough to take 1200mg of MDBZP and get rushed to hospital after collapsing and having convulsions...
In my defence though i would point out that several other people in our circle had taken 1000mg of TFMPP, 1000mg mCPP, 1000mg pFPP previously with no such adverse reaction, i had personally taken 1000mg of BZP myself and known people to take 4000mg of BZP without having convulsions, and so i didn't anticipate that MDBZP would be any more dangerous than the other piperazine analogues...you live and learn ay!
I'm surprised that 2,5-diMeO-4-Br-BZP is even active but if slopoke got it from a reputable source then i will accept the reported stimulant effects as valid...when i was working for the party pills company in NZ we looked into getting 2,5-diMeO-4-Br-phenylpiperazine but the price they were offering for a kg was far too high so we ended up getting methylone instead which was way better than any crappy piperazine!
The one piperazine i did try that i quite liked was 2-BZP, the isomer with the benzyl group attached adjacent to the nitrogen. Quite different from any of the normal analogues with the aryl ring attached to the nitrogen directly, it was fairly trippy and euphoric and with much less side effects than the other piperazines. So if i was ever going to suggest new piperazine analogues in the future i would definately go for derivatives of 2-BZP rather than the 1-BZP or 1-phenylpiperazine derivatives that are currently sold.