These are a very convenient way to keep your house smelling nice and they aren't too expensive to replace. Much easier then the burners I'm used to. The only downside is don't set them down anywhere after using them or they will melt any surface (they aren't convenient to store or to put away when not using and they have no off button)
I absolutely love the smell of berries and these are so effective and smell amazing I could seriously plug one in one room and have the whole house smelling amazing. Definitely recommend and will buy again.