Im still not decided conclusively about whether emds provide a significant benefit. I've ranked both emd and non emd and havent seen a drastic difference in how quick an emd ranks. Im still playing around with them, I might get another one in the next few days to try. I'd recently bought one comparing it to my non emds on a site I add new kws daily. It seemed to rank to number 2/3 rather quickly but difficult to tell if it would have done that anyway as every kw is different. So Im thinking I will have to do a few more to get an idea once I see patterns form.