First impressions: I like the layering effect from the trees to the hills to the sky.
Composition: The transition from reflection to 'real' is in a position that makes me think the positioning is a mistake. It feels off balance. To me there are two images here. The reflection and the real landscape. It could work including both if the transition were deliberately placed in the middle.
On the other hand, concentration could be made more on the landscape or more on the reflection. This would allow the transition line to be very high or very low in the composition. Both aspects of the image have their strengths. I just think a better image is hiding here.