I bought mine from a DC area dealer. Paid $500 over invoice and used the $1500 USAA bonus cash incentive. After the USAA incentive, it came out to $1000 under invoice and the only other fee I paid was a $200 doc fee. Came out to $4430 off MSRP (not including the doc fee).
There was no negotiating. My CA asked me what I wanted to pay and the GM accepted it. My car is supposed to finish production tomorrow.
If you use the USAA bonus cash, don't go through their car buying service. The manager told me USAA car buying service is a $1000 over invoice plus a $300 dollar fee.