Alright, I've been experimenting more with vaporization, and I'm going back to saying it's not a particularly effective method, by itself. If you enjoy low dose dissociatives it'd be worthwhile, and the duration is shorter than other ROAs (which might be considered a plus with this one) but using this ROA exclusively, I find it impractically inconvenient to vaporize enough for a strong dissociative experience, and ended up resorting to supplementation via other ROAs. Also, while this may be an issue arising from contaminants in my sample rather than the substance itself, vaporization of larger amounts of this substance seemed to cause a rather concerning rise in blood pressure and body temperature I didn't notice with other ROAs.
And a health warning, again it is possible this is more an issue with contaminants, but I recall hearing this is somewhat of an issue with freebase forms of things in general, the freebase form of this substance seems to be particularly caustic/hard on the mucous membranes of the body, snorting leads to nose/throat being sore multiple days, and I now have reason to believe that frequent oral dosing of this substance (and not the GBL I was doing daily at the time, like I previously believed, though that certainly didn't help) was the leading cause of a stomach ulcer/internal bleeding problem I had in January. So anyone possessing the freebase should probably convert it to a salt to be on the safe side. If you were spacing out uses with a couple weeks break in between, I don't think it'd be an issue, but if you're like me and have a tendency to go on dissociative binges, you may be putting yourself at risk.
I have no idea about the properties of the salt form, but since it has been plugged/IM'ed by people without any complaints of irritation, it seems to be much more benign, though due to concern of contaminants in at least one batch, I would think twice before deciding to inject this stuff.