Just started a postdoc, but it went REALLY bad, REALLY fast. Stay or go? I just started my 2-yr postdoc, but things have gone sour really fast. So, I really need some career advice as to what to do.
Over several months, I did the interviews with the supervisor and the lab and things seems to be really great (although I got a strange feeling that the lab members were trying to deter me from joining, see below).

I joined the lab last week, and the condition of the lab and the equipment was really poor (but the supervisor said it was great...), but I got along with the supervisor and the lab great. However, this week took a turn for the worse. My supervisor has been vicious with me for several days and we have had a major conflict almost everyday this week, which I believe is a bad sign when something like this happens when starting a position. The other members of the lab said that the supervisor is frequently is overbearing, micromanages, and has "lost it" on them for reasons as asking for vacation. As I said, I met with these lab members via Skype over the summer and I felt that there were trying to warn me not to join the lab, and today they confessed that this was true. One of the lab members did file a complaint against the supervisor. The situation was that the supervisor typically makes numerous phone calls during weekends and the one time the lab member did not answer, the supervisor was furious with her. She then made a complaint to the appropriate person in the department.

I am concerned about the supervisor and more concerned that this is not going to help my career at all since the mentoring by this supervisor is poor quality (this is how the other lab members feel after being there for almost 2 years. They are leaving immediately after that). She has promised a good work environment, additional pay to the NIH base pay, flexible time off and great equipment, but all of this is not true. The other lab members confirmed that this happened to them too. Basically, this supervisor promises a lot of things and does not deliver.

So with all of that being said, is it wise for me to leave ASAP and look for a better opportunity OR is it best to stay put and complete the 2-year postdoc (or most of it). I don't favor leaving a job this soon and would rather give things a chance, but this place has been extremely BAD. Furthermore, the lab members feel that this is not a good workplace and confirm that the behavior of the supervisor will continue (they have their reasons for staying, but really regret joining). For these reasons, I don't feel staying is beneficial to be perfectly honest. 

I would rather not have to ask for advice about this, but I am in an uncomfortable situation and any advice is extremely appreciated. Hopefully I expressed this clearly... I'm kind of a mess right now.

EDIT: 
I have resigned from the position. But, I have obtained a new position with someone I know well and has helped the careers of people I know. Aside from the conflict with the supervisor and the experiences of other people in the lab, the position I'm resigning from just does not offer any development for my career as per my impression prior to arriving in the lab. Unfortunately, what attracted me to this position was not the reality. Even giving this position more time would not change the condition of the equipment I have to work with (and the lack of equipment), the lack of safety practices in the lab, nor would it change the supervisor's lack of organization, leadership and the control of her emotions. 
Also, I discovered that all of the current lab members plan on leaving within the next few months. Past/current postdocs typically do not last more than 2 years.
With all else the same, given an choice between staying in a bad situation that cannot be resolved or leaving it, the decision is easy.

Of course, all is never exactly the same. When the balance is uneven, I hold at the point where you are that following your passions and desire for healthy growth is the most important factor. You can and will end up in situations where leaving has worse consequences than staying and you must therefore resolve the issues at hand or let go (and stay where you are). Is this case really to that point for you? I sense not.

As you weigh the various concerns, realize that you owe the lab only the respect that you will never be dishonest. The promptly, professionally delivered statement that "I am leaving because this is not the fit that I really wanted" is all that is required at the end of the day.