Overall these splitters seem to be of pretty good quality. I haven't tested anywhere near the full power rating, although so far I've had no problem pulling up to 600W combined from 4 ends. I haven't noticed any thermal issues with the cables. As for the product itself, the connector ends appear to be injection molded and the cable jacket feels thick and should be strong. Connecting objects to the 4 ends is painless and the slight resistance I noticed leads me to believe the plugs are making good contact with whatever is plugged into them.
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