I hope this post sheds a bed of light on the situation.
I recently became the owner of a small amount of bromo-dragonfly.
Using milligram scales, I weighed out 32mg. I wanted 30mg but seemed like too much hassle to try and put 2mg back. I mixed this into 300 drops (using a standard 10ml brown dropper bottle from a chemist) of vodka (smirnoff, for the record

).
By my calculations this made each drop an average of 106ug. It dissolved very well after giving it a vigorous shake...no sedimenting or lumps floating around.
I went to a party. I did two drops, so ~212ug. I felt a bit heady and had slightly visuals after a couple of hours and was enjoying it so did 1 more. It was very dark so it's possible I did 2.
At the party I was drinking a lot and did a couple of lines of ketamine but it was definitely noticeable and generally enjoyable - heady feeling of general wastedness, no body load at all, and very delicate shifting distorting visuals. everything had a kind of dirty muddy feel, enhanced shadows and contrast between light and dark and less defined edges.
I really began to feel the stuff after I left the party at about 11AM-midday (about 8hours after dosing)...had an interesting tube ride, generally felt very relaxed and enjoyed myself. could still hold conversation with people at home but also content just chilling out. I often get anxious or restless on some psychedelics but not this time. had some pretty cool trails and nice colour shifts, distortions etc but still quite subtle and not over whelming mentally or physically in the slightest.
I then decided to go climbing in the afternoon which I could do no problem and was a laugh even though the centre was packed...never been on a sunday before. was still feeling after effects at about 7pm that night.
I'd summarise it as some kind of ultra refined DOx, like the difference between a fine wine and slightly cheaper one. Obviously I could try a higher dose and it might be a totally different experience...maybe 4-500ug next time all in one go.
I also thought the come up was good, not intense at all...i generally dislike come ups on psychedelics.
downsides I guess are duration but it was much easier to relax on than DOI which made me really tense and uneasy. A valium ensured i got some sleep by the end but I reckon i could have fallen asleep alright by the time i went to bed.
it wasn't totally disimilar to a low dose acid trip either...
hope this was handy.