Try it absolutely in place before entering !!

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I was not initiated until the heater mat.
I had heard about electric blankets.
I ran through my readings heaters, warming pans, the "monks" living bodies of various species, magical chemical heaters, short I was not born the last rain.
I have used for years with unequaled passion rubber hot water bottles - very comfortable but certainly not ideal for the movement (the advantage being able basarder the middle of the night, contrary to what Ben Monk Monk is.? "a metal container containing hot ash firewood from the main room, isolated between two wooden sleds")

In short, I'm right on target!

My first impression was excellent: a soft mattress and rather fine, washable, a very long electrical outlet, ultra-basic adjustment o 3 (3 for setting heater, positions 2 and 1 for possible relay).

My second impression was that more mixed: hurry to see "how it worked" we place on a sofa, connected 3 ... um, barely warm, even waiting a while. A warm feeling when lying, certainly, but it seemed to me a bad start to warm a frozen body or a rustic bed, cold and wet.

(Ensued a heated conversation with my husband, who supported me and that it was normal enough, what I protested vehemently, arguing lindéniable that he was not hesitant at all and there included nothing ^ - ^).

Not wanting to stay on an incomplete impression, I have read (well read ...: /) the memorandum and the beast lying in bed, waiting for 30 minutes recommended.

And oh, miracle, it works !!

In short, the heat losses are notable, if the heating mat is not covered with a duvet or blankets, hot feeling is almost zero. In bed though, it heats very well, we enter a cozy bed! The mattress is really hot, unless you really frozen or crippled with various pains, I think many will be content with this pre-heating and stop the device very quickly, even immediately.

(For a very cold and wet bed I think it is good to take longer in advance, by airing to allow the water to evaporate).

In conclusion: an excellent value for money and a very attractive alternative to the good old hot water bottle!