For most people, who are mainly looking to get "fucked up," a low dosage psilocibin mushroom encounter will be said to a be a waste. However, these people clearly cannot appreciate the power of substances in low dosages for the most part and are missing out.
I'd say a 1-1.5G mushroom experience would be similiar to that of an MDMA/MDA combination; in the sense that it makes you more open with minor to no visual effects at all. Expect euphoria, no anxiety I do not see why this was said, anxiety is something usually expected through higher dosages of mushrooms. A low dosage of mushrooms can be very relaxing and enjoyable, so much that you could consume a low dosage of them and go out in public without anyone knowing you consumed them. They make you very familiar with people, being able to speak openely to almost anyone, while being able to get a "feel" or "energy" of the person's reactions within the conversation you're having with them.
Also, for someone who is not ready for fully blown trip, typically you could consume 1-1.5G and smoke some nice buds. Maybe roll up a few joints to spread out, some Vitamin Water, nature and of course a must classic rock mix on hand. This is what I did for my first mushroom experience, and if I could go back, I probably would have never consumed anything over that amount (no regrets regardless on my 3.5+ gram experiences, without them I would be an entirely different person).