I Just wanted to add my opinion after trying this drug. Two different batches: Earlier one was clear, damp crystals, Most recent is translucent off-white large, dry crystals. My initial impression is the off white batch was stronger, but see my comments below for my reasons to doubt this.
At first, I was very happy with it. It comes on in a pronounced manner: computer monitor, TV way too bright. I've also had a strong aural effect on a 140 mg dose(I have perma-tolerance) where the sound of a window air conditioner in the next room, and the floor fan, which normally are easy to tune out, became HUGE presences. The sound was loud, and seemed like a powerful "thing" that must be shown respect. The sounds also had an indistinct, human like muttering that I couldn't understand. Perhaps because I'm experienced, this didn't bother me(except for how LOUD it was!), and I was rather bemused, like "I can't believe how dissociated I am, this is NUTS!). I should note that on MXE, the sound of running water(kitchen tap or toilet flush) always had a strange, echoey, reverberated quality, which made it sound huge.
At first it really scratched that MXE itch, and I suppose it will have to do. But, like others have said, it lacks the depth, complexity and magic of MXE. No figuring out confusing and complex social group dynamics, no feelings of synchonicity, of fate and inevitability, like "This chem came into my life right when I was ready and able to benefit from it"
But O-PCM does have a decent antidepressant effect for several days. O-PCE as well, which I consider less recreational. I should note that I bought all my MXE from the original vendor in early 2011, and it lasted almost three years. Quite a few of my experiences on MXE(25%?) were kind of "blah", or confusing and kind of negative. Yet, the next day, I always got an antidepressant effect. Although that effect was less apparent with increased usage, like it's a side effect that goes away with use.
Some people seem so eager to blame substandard or negative experiences on a new batch, but in my experience, substantial variation of experience can happen within the same batch over time. I recall a post of someone who had a sheet of blotter LSD in his freezer for a year, and didn't tell his friends it was all from the same sheet, and they were sometimes thinking the hits were much stronger than the last ones, or much weaker, and yet they were all from the same sheet. He also admitted his experiences were so variable that he could easily believe that the drug was degrading, yet the next experience was the best yet.
Finally, I am curious if any males out there have noticed an inability to get an erection on seemingly all dissociatives I've tried. It feels somewhat similar to when I was on the SSRI paroxetine, where I could not get an erection or achieve orgasm. Has anyone tried viagra? Would it work in such a situation? This question is really the one I want others experiences.