I got a couple of these to transform US power to Swedish.
Guitar amps and studio Eqs and Compressors.
Gives good clean and quiet transformation!
I really do have the American electricity plug though, it has a tendency not sticking good in the socket. It's like Firewire and Thunderbolt, which also must be the shittiest connectors ever. Top three worst.
But apart from that it's great! Actually the US power socket has very little to do with the quality of this thing. Get a grip America! Stop with the wall building already and spend your tax money on updating your sockets! Please do the Thunderbolt too while you're at it, and send out free updated cables to everyone.