Tried electric years ago but didn't see any advantage over doubled comforters with no additional charge on my electric bill...
In our 50 years of marriage, we owned one electric blanket. My wife gave it away. If it weren't for pipes freezing, I honestly believe she would sleep with the windows open all winter long!! The AC is turned way down in the summer and the furnace gets little use in the winter. I'm about ready to consider heating bricks like the pioneers used to do to keep warm at night!!!!!!