I keep mine on the lowest setting, I have a lot of pain in my neck so this heated pad is great for relief. If you go any higher than the lowest setting you'll probably burn your neck and that's not fun either...but sometimes I'll temporarily switch between medium and low throughout the day. I think this is one of the best heating pad products I've tried out to date that's perfect for working from home. I don't love that it's connected by USB because I joke around that it's my "collar" and I'm basically chained to work but it does the job, I would highly recommend this product.

Took a chance with this USB Heating Pad and I’m glad I did, driving with my problem neck was getting to me, now all I have to do is plug in and the heat has made driving bearable again, great product.

Got it out of the package, plugged it in to a USB plug, and put it on my neck. Awesome! It works like I want. My neck feels great. This is better than a standard heating pad, that I have to fold to my neck. This brace wraps around my neck. Awesome! I think I may get small ice packs too.

This works great! Just what I need to have at my desk for my neck issues.

I did knock off one star for comfort, but in all fairness the comfort is a "me" problem rather than a "product" problem--I don't like wrapping things around my neck (hyperactive gag reflex) but can never seem to find a GOOD pain relief device that doesn't require it.
So it is, sadly, of limited use for me personally when trying to deal with the neck pain or tension headaches that it's actually meant for. I can wear it on my neck, I just have to wear it loosely enough that I don't get a lot of heat from it and have to take frequent breaks from the thing.