The on you have now might not be large enough for your room and a good idea is to move it to a smaller room and replace it with one that is larger.
There are models that come with a tank that can hold more liquids and do not have to be filled continuously. These are also very helpful for a night sleep.
It is obvious that there are many options available. The diffusers we found come with nice customer ratings and look very nice.
They can, besides helping you with adding essential oil or aromatherapy in your room, be a nice looking addition to your decorum.