Doesn't get very warm - and not anywhere in the range of "hot."  Not a good purchase.
I am not sure this even qualifies as a heating pad...I can't register any actual measurable heat from it.  I have it on the "highest" setting - 3 - right now.  It's been 10 minutes.  There is a tiny bit of warmth, but it wouldn't qualify as a heating pad.  I'd feel more heat if I had slathered icy hot onto my shoulders.  Sadly, Into the bin this heating pad goes.  Don't waste your money.
Rating: 2 stars