It's a lovely scene in its individual parts. The water is a wonderful colour and it's 'texture' is great. The sky is a nice blue and has a good graduation. The minimal clouds are nice and soft and the distant land is a good divider. When it all comes together, though it all fits perfectly, I get the feeling there is something missing. I think perhaps it's the crop with the horizon near-centre, which rarely works. Don't get me wrong, the bits that are there are superb, I just think it could benefit from a little something extra. Great shot none-the-less, well done.
Picture suggests tranquility. Horizon could be off-centered a little to keep from going through the center of the picture. Perhaps cropping a little of the dark section of water at the bottom?