I am not seeing a coach, and I don't intend to, except MAYBE when I go to a different phase, but maybe not.
It is your decision since everyone is different, some people need the support, some find it good to go and be weighed weekly, I am doing well without it, I already lost about 43 pounds on my own.
Believe me, all I learnt about this amazing program was from this wonderful site and the wonderful people that post in here, it was not from my coach with whom I started.
Good luck, you can do it