The first image is from about 5 days ago, the 2nd and 3rd images are from this morning. The image from 5 days ago you couldn't see anything under the surface of the water. The images from this morning already show a huge difference. It's got a ways to go still, but things can be seen on the floor!
BTW, the robot is a cordless (5000mah battery) robot. It was given to me as a gift. I originally wanted a corded robot that has a finer filter (bags I think), but the gifter knows I love technology (I'm a software/web/db dev) and thought this would be cool. While it does take a good time to charge, it runs for about 1 to 1 1/2 hours, and it does pick up a good amount of stuff.