I actually enjoy diphendine: (
http://www.bluelight.org/vb/threads/819706-Diphenidine-experiences-(low-dosage) )
I also did higher dosages now, 70 and 90mg. I still need to write a report of it. I somehow really enjoyed it. It isn't a wild ride, just a peaceful blankness with those dosages. Little thoughts. Really dreamy, easy to lose time. The world is utterly alien. You just sit or wobble a bit, while the scenery becomes chopped up and pixelated. It goes well with small amount of opiates. Then you will sit in a warm void.
For some reason I made on both instances a cup of coffee with milk and lots of sugar in it. That went really well together. It was a hassle though to do, but it makes the experience clearer.
I cannot explain why I like this drug. I just really enjoy it. It is not even that moreish. I never redose. I would like to try a bit higher, say 120mg. But need to wait to bring the tolerance down again. NMDA-antagonists take a bit of time to lower again.
Another thing: On low dosages it is really effective of suppressing opiate withdrawals. 10/20 mg is enough, you can still function normally. It just stops the RLS, however your mood will be quite gloomy. (But still better than plain withdrawing).
It really reminds me of the the trip reports of mk-801. I know, that it is difficult to bring over mental states by words. But from what I read it is close, just shorter. It is not as creepy as it sound though. The whole experience is serene on the gloomy side. Like being utterly alone in the universe, but somehow enjoying it. It has a dark edge, but still I really like this stuff.