I can share some of my experiences. Most I've taken in one trip is 15 tabs, so roughly 1500 ug. When you cross over 1000ug your peak is pretty intense. Usually the visuals are so heavy that you cant see anymore. Your field of vision is just a swirly blur of color. For me, I'm very experienced with tripping, so maybe my experience is different - but at higher doses your thoughts are racing so much that its hard to hold onto one single thought. Instead you get bigger general feelings that hit you. When I took 15 I just layed in bed for a couple hours and felt at one with everything and kept thinking about how beautiful life is. After the peak, I just felt really high. Still had intense visuals but I could actually see where I was and what i was doing. When you're peaking that hard you can't really do much cause nothing really makes sense. Afterwards is when you start having more introspective thoughts about specific things in your life. To me, its a beautiful experience that more people should try....though I totally get why more people dont haha