Two weeks ago: Took 400, maybe 450mg. Physical effects, couldn't walk much, felt exhausted, couldn't concentrate. It wasn't pleasant, but it didn't feel bad enough to put me off trying again.
One week ago: Took 700mg. Couldn't get out of bed, gravity was *turnt up*, holy shit. I was shaking and spasming and every inch of my flesh was screaming to end the misery. I wasn't *actually* seeing anything, but I "felt" like something might be watching me. Sometimes I thought I saw a small flash or bit of movement in the corner of my vision.
About an hour in, it was so bad that I crawled to the bathroom. Forced myself to vomit--it was a struggle, took a while. And nothing came up but clear liquid. Too late to pussy out and get rid of the Benny in my system. I considered calling 911, but didn't. I crawled back to my room, laid in bed, and mercifully managed to pass out for several hours. I still felt like shit when I woke up, but it was manageable, not as awful as before I'd slept.
It took almost 2 days to totally come down from the worst of the effects. For several days after ingesting the Benny, I had a bit of HPPD going on, still seeing movement/flashes in my periphery. I still get it when I'm very tired.
"Miserable" is putting that second trip lightly.