I just finished Free. I really liked this anime. I remember when I was first going into it with all the female fan hype behind it, I wasn't sure if I was going to like it. It was much better than I expected. It reminded me of Kuroko no Basket but about swimming. I really liked the story they had between the characters and the way it progressed. A few of the characters themselves bugged me a bit, but not enough to ruin the anime. The graphics and animations were just visually stunning, especially the water.
Overall I really enjoyed this anime. ~ 8.5/10