you need to eat the 30g's each 2 of my mates bought 30g's between them and felt like shit this is if you are getting cubensis i have had 5g's of hawain cubensis and i tripped from 10at night till 6 in the morning im guessing your in the uk so 30g's should only cost you about £10 its worth it i was in a room when i did it for my first time and felt completley safe though ive heard this can be a bit dodgy i was with my best mate at the time and ive also heard that taking shrooms with someone who isnt doing them you dont feel like spending time with them or talking to them i know some of what i said was coverd above i just didnt want to read all the posts to see im a lazy bastard