Review (1/5): Maybe I got a bad one.
The first time I plugged it in and turned it on, the light read “err” and it would not heat up. I turned it off, unplugged it, tried again and it worked fine. It would do this every 2 or3 times I used it. After approx a dozen uses, it just stopped heating up. I’ve already thrown out the packaging, so I can’t return it.