Finally got my hands on some of this. Haven't pushed dose over 20mg PO yet; at that dose it was quite mood-elevating and darkened my vision/reduced light sensitivity as all ACHs seem to do, but the only other noticeable effect was faint background "music" like a radio being played in the next room. It seems very subtle but perhaps I need to go a bit higher and/or add some cannabis. I likely have some amount of permatolerance from having eaten more than a few grams of MXE while that was available.
No comedown and definitely none of the hangover, general malaise and weird oily skin I got after O-PCE, but no weeklong afterglow like MXE used to do either; though I am dealing with some pain from a back problem as well as existential anxiety and gloom over current events, and all of that is definitely affecting my mood. It seems to me that ACHs have something of a "learning curve" to them, and I'm keen to experiment more with this one, particularly in combination.