I was one of the rare people that loved BZP. I used it in various forms and other piperizines over about 5 years.
Bzp itself had a rush in the onset. The come down was certainly not absent, for my body, it was a bit below good amphetamine in quality and comedown severity. But it was decent, certainly better than benzedrex inhalers (propylhexidrine ) , if carefully extracted with a lemon tek. So between these two if this helps gauge.
If it was combined with tfmpp or mcpp, it was heading into very different headspaces.
The combination with tfmpp, was similar to mdma sort of. It would easily pass as ecstacy pills to the masses, but it was still different in lots of ways. It created an openness, but it was forced, now blossoming under bliss like on mdma.
The body load was quite high it seemed. All my friends had body load symptoms, nausea, vomit, muscle cramps, all varying degrees... nothing significant or concerning tho.
I really enjoyed this while it was around