This is a professional lens. It's spectacular for shooting weddings and works very well for portraits. At 200mm F2.8 the depth of field is very thin. It's long and heavy so get a good strap. Pairs extremely well with the D800.
Beastly autofocus; Great working range for people & portraits; Quite sharp; Great contrast; Great build quality; Vibration Reduction is amazing
Very long and heavy; 200mm is more like 125mm at close focus distance