I don't know the NBOx well, I just remember my 25i-NBOME trip on 3 blotters of unknown dosage.
That was mad, absolutely mad, the visuals are so insane that you literally cannot see in front of you (no other drugs comes even close), but you're still suspiciously clearheaded. It felt extremely empty, like a massively stimulated mind through sheer madness.
I had to flee my house because I was panicking, then I ended up in the middle of the city, at noon so all students there, raining hard as fuck and I forgot where I was, couldn't see shit and I felt my ego slipping away through all of it lol, that was literally insane. Then my friend managed to find me and get me inside, the poor guy had to listen to me ramble on 25i for hours afterwards still.
Never again