ZHOU W 5 I have been using this for almost one month and this socket turns out to satisfy my every requirement.First of all, most of the socket you can buy in Japan provides a maximum of 6 ports. For a tech guy like me who can’t live without lots of electronic device, I would need to extend the socket by chaining two of them together, which, is actually annoying because of too much cables. BUT this one provides 10 ports!Second, even USB ports are coming together so that I can save some power adapters! You would see how many empty sockets are made available by leveraging the built-in USB ports.Third is a potential drawback but it does not apply to me or most of the people living in Japan. You would notice in the pic that socket has a hole for neutral line but it is actually not supported!