Got this for my wife and children.
This heats up really fast, recommend to turn it on 10 min before you sleep.
Only turn to 1 or 2 when asleep, otherwise you will be awake because it gets too hot, even at room temperature of 3-4C.
Luckily for this electric under blanket, it's now both eating and heating, instead of one or the other.
This works better than the electric blanket, trust me I have both and now getting another one for myself.