Was the point of focus the reflection? The other objects are just a bit too out-of-focus for my taste. I think a few stops down and exposing for the inside light, or maybe half way between the indoor light and outdoor light, might be an interesting thing to try. The bright outside is very distracting.
Out of focus and extremely blown highlights which is easy to do when shooting from inside through a window. Normally I don't comment too much on blown highlights but since they are a major portion of the reflection and the reflection is the subject of this challenge I feel it really hurt this picture.
Nice creative use of reflective surface. Next time I would work on sharpness. Seems to be out of focus. Also, I would work on the exposure. Higlights in this image seem to be blown out.