I have been experimenting with high doses alone. I just took 700 mg moments ago. I enjoy it with caffeine and music. The auditory hallucinations are very real, like indistinguishable from reality. I could hear my neighbors talking about me on a 700mg dose last week. They were saying very specific things that seemed like things I couldn't have imagined but I know I was delusional. Very interesting. Had to turn on music because it was getting kinda paranoid feeling. But otherwise Very relaxing. Their is a heavy body load. Erowids effects are accurate. Vision gets blurry after an hour or two and last 12-24 hours. Had same thing happen on Datura l. In my opinion it's best around 200-300 mg with 400-800 mg DXM, a few hydrocodones, an energy drink, some bud and good music, like minimal melodic or dark house. That's a potent mixture so be careful. But yeah, that's my opinion of DPH. Good potentiator for DXM, opiates and weed and occasionally good at 700 mg with caffeine and music.