I have used boot dryers before that just didn't do the job, I thought they were all a farce so I was skeptical at first.  Due to the great price at Amazon and being tired of wet stinky feet I bit the bullet and ordered this dryer.  Plugging in the dryer it is silent and wasn't generating heat, I thought junk, but after a few hours my boots were bone dry and toasty warm inside. It hasn't been unplugged since and I rotate my pairs of boots on it daily.  It is rated for 30amps so operates very inexpensive.  I will be ordering additional dryers for home for kids gloves/boots and another for hunting camp.  That good!