Could anyone recommend a single electric blanket that warms up quick, and has a decent heat please? I bought a Slumberdown one in the sale but it's so slow to warm up and when it has it's hardly what you would call warm, and it's on the highest setting! And it took an hour to warm up!! I have never owned one before so have no clue to how quickly they heat up and how warm they are meant to get so any input would be appreciated!!