In order to be a proper candle warmer the bottom has to get hot too, it has a very slippery smooth, shiny surface that makes the candle slip off of it easily, and the grooved bottom is not deep enough and not centered , the bottom of it is textured plastic and I don't think anything that gets hot should be made of plastic, the look of it is very plain boring and generic, adjusting the height is extremely difficult and I think dangerous once the candle is melted if you tried to adjust it You could spill it trying to adjust it, And there's no way to lock the height it doesn't screw tight and have grooved grip like it should