I ordered two vials from TWS about a week ago. I don't suggest taking half the vile. I took half the vial and didn't feel much but, when I took the full vial, man was it spiritual. There was no stomach pains and nothing wrong about the trip. The tiles in my bathroom shifted around aimlessly and it was a very good experience. I grabbed my notepad and wrote down some ideas. If you ever want to trip, TWS is where it's at.