There are many reasons to choose bioethanol fireplaces.
The size and the weight aren't an obstacle if you want to move the fireplace. They don't need gas or electricity because the fuel to use is the bioethanol, an alternative energy.
When Bioethanol burns, it's odorless. It produces only a faint odour, when you extinguish the flame. There are no smoke or toxic emissions, so you won't need a flue. It's a cheap fuel and it's ecofriendly. 
The Fireplaces are made of hi-tech material. The mode of operation is very easy: extract bioethanol from the container, pour it into the burner and light it with the provided electric lighter. The waste is little and easily removable with a cloth.