the blue in the water is fantastic, the branch/tree takes too much of my attention for me to rate highly, very sharp and vivid colors. If the tree were more to the left then the blue water would really make the picture stand out.
Good lighting and colors on this shot! It seems perhaps a tad oversaturated or oversharpened in some areas. The edges of the large branch look a little jagged.
This is a strong composition on its own; however, the colors seem to wash into each other. I'm not sure if the picture has a lot of noise just from your camera or if you used a watercolor-type effect in Photoshop but it takes away from the colors and the beauty of what looks like a great scene. I would also suggest (if you can get one for your camera) using a Polarizing filter. It would make your sky that much more blue naturally so you don't have to worry about adjusting colors after the fact. Hope this helps - it's a really nice image, but wanted to let you know my impression. 5