I've only had DOC 3 times... at 3mg, then 4mg, then 2mg (with 40mg 4-aco-dmt for the last one).
I feel it misses the mental stoning I like from tryptamines (there is something there, but it's a much more clear headed universe for me). I love the duration, but not the sleeplessness. It's more difficult to find time for. I feel that it will be best for me higher, 6-8mg, but my journeys there will be a while away. It's not the first thing I reach for when wanting to get stoned, connected or reflective.
I found the mixing dose the best so far, because it added some profoundness to the drug that was missing for my taste. Will post back when I get time to taste more. I have a feeling I'll be more impressed as I climb the ladder. 4mg is definitely a plus 3. And the 8 hour peak really seems divided into two separate 4 hour peaks. You really drop after 4 hours to a lower level, to a plus 2 for me with 4mg. The meat and chunks of the stone are that 8 hours though.
Disclaimer for drug quality and my measuring accuracy
It seems to be a very good party drug IMO. Suited to raves. I'm a fairly relaxed country type, and prefer more calm settings. The visuals on DOC are fairly amazing, but lack substance for me so far. I would say it is an interesting drug, but I wouldn't recommended it as a first psychedelic. The body rushes and temperature regulation may not suit a naive tripper. The body load could easily become a core focus of the trip.
The cost for visuals is low though, the visuals are the drugs shining glory for me. Boom yeah! and the reason to revisit.