I have had this lens for a few days, really like it. My lens setup is now a bit overflowing and I am considering selling the 24-70mm f2.8 and keeping my line up thus: Tokina 16-28mm f2.8, Sigma 35mm f1.4, Nikon 50mm f1.4G, Nikon 85mm f1.4D..
Here are a couple of samples (full res on flickr):