Too good winter but could be better.

Hello. I've always used my own without the cover because otherwise it's true it was barely warm !!!!
Without the cover she took a year knowing that when it's cold I recharge several times a day.
After a year she did more heated suddenly.
It is not very big and we feel the mechanism inside. This is quite unpleasant in bed but good heat is so nice! I do not know if there are more comfortable electric hot water bottles but it is more affordable than other over the life of the article.
J appreciate being able to heat it without leaving my bed / my coverage / my couch, my cocoon what!
By cons, when it starts to cool you can not redo the heat immediately and it is very frustrating! We have to wait a while and it was cold!

Still, despite everything I have just to recommend two, one for and one for my feet up!