I just today is day 7 on "faze one" for me too. I'm down 8.5 pounds. I love P1 for that reason. I can get some fast results.
I agree with the others that have said don't go longer than two weeks.
I did it for three weeks once. The first two weeks I lost about 13 pounds the 3 week I did it ( I was phase one to the letter!) ....anyway the 3rd week I did it I didn't lose a single pound. Your body wants more food and different nutrients than that.
Congrats on getting week one out of the way!