Light weight pop in electric insert.  Have an old house in Maine and the winters are brutal. Needed this for some auxiliary heat. 
It is the size I needed for the old fireplace and the choices were limited there. Remote doesn’t operate properly. The halo thing is a little bizarre, but all in all it fits nicely, and looks ok…. will find out about the heating piece soon enough. Price seemed a little high for this but if it does the job I’ll be happy.