The Atlantis Truffle is known for its visual effects, which has made it a favourite among more experienced users.
For most people, 3 to 5 grams have a light effect, while 10 to 15 grams can lead to a strong high. 
First effects are likely to be felt after around 15- to 45 minutes and can last somewhere between 3 to 6 hours. 

You can eat Truffles or use them as a tea (let it simmer for 20 minutes, don't let the water boil).

BE AWARE that these amounts are averages and can vary from person to person. Always start with a low dose.