Only 1 point I give because:
- The plug has very thin contacts and the outlet itself becomes a loose game.
- When unplugging the USA plug dissolves first as the contacts are too far back, the plug is always shaky here and you have to fish the remaining front from the wall socket -> Who would not like to operate with his fingers in sockets on each case buy a different product.
The risk and the trouble with this product is out of proportion to the actual benefits -> so I can only advise against this plug solution.