I got one a week ago and normally use a Sony compact for quick shots. Was attracted to the rugged promise. Having said that the results were disappointing with loads of grain. I fiddled with all the settings possible and found that it did not improve at all. I shot parallel with an old Sony 10.6 MP and got much sharper and low grain images than the AW100 at 16MP.
Planning to talk with Nikon to ensure it is not a defective piece.