i like how the picture feels calming. on the downside, my eye tends to be drawn to the lower left corner, because of the ripple or shadow. eliminating it in some way would help strengthen the composition.
nice shot. would like it a little less centered and with more reflection. i know it can be tough to get close without falling in (unless you are using a zoom/telephoto). the greenery is somewhat distracting...maybe try a different cropping?
Nice image. Levels are good. Colors are good. I really like the negative space. Reflections are good, especially around the leaves. Without them, it would look pretty flat.