Heater received as a gift for Christmas, once opened immediately tried! I am an unconditional cold feet in bed and can not sleep with cold feet! My husband was preparing me my little water bottle (water) every evening (happy woman I am!) But there have been some leaks in bed ... And there great discovery: that electric heater! A little dubious at first: I found it a bit heavy, funny smell in the initial heating (due to the fleece jacket ???), not malleable (can not knead the heater with feet to massage the toes ...) But in practice, I completely adopted! It heats in 3 minutes (and turns off automatically), and reaches its maximum heating point in 20 minutes, it remains warm almost until morning! It distributes heat very well in the bed Small problem: the sheet is turned yellow at the location of the heater: is it due to the orange color of the polar envelope, new? I washed the fleece jacket and getting a small bag jersey I put over it, and there it no longer déteind. True, the zipper of the jacket is tight and not comfortable, but with my bag over (with drawstring) no problem! If you're like me hesitant to fall asleep, do not hesitate, it is really ideal!