A good image of a great idea. All in all, the centered composition, with the reflections going all the way to the top, draws the eye up out of the frame. Placing the mirrors so the reflections do not reach the top would have drawn into the frame and kept interest better.
Like LisaCan, there is something else not quite right that I'm having a hard time putting my finger on. It is perhaps the lack of emphasis in the image. A diagonal row of reflections would have produced more impact, but it may have taken from the tranquility that I think you were shooting for.
good picture, i did the exact same thing but i used more candles and shot it in black and white, it's funny when you first discover it it's such a rush. Mirror are just so facinating