It works fine.  I had some difficulty finding a thick, TALL artificial candle that I liked. It looks to be good quality, feels waxy like the real thing, and the timing mechanism works properly.  My main complaint is how low the flame is in the tall candle.  It looks very unrealistic.  If the candle were real, it would not be so perfectly shaped at the top.   It would look much more subtle with the flame placed nearer to the top, just out of site.