I bought these when I lived in a house with ungrounded two-pronged outlets. I found it inconvenient to use adapters everywhere and they were inconvenient for some things. I personally have used them for my computer equipment and kitchen appliances. The build quality is good, they have a lightness that makes them doubt their quality, but functionally they worked well. The flat angle plug was good and the USB sockets were used for charging phones and lights without hesitation. I've since gotten rid of them (donated to a local thrift store) but they've worked great for as long as we needed them.
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