I haven't bought a HF S10/100 from the US, but I bought a HG20 from the US and it works fine, other than the need to use a multiplug. The adapter is listed as 110-240V, which means it can be used here too.
The only small hiccup (in my one, AFAIK) is that one of the tips for the adapter's power plug is wider than the other, which means that it is a lot harder to go into the socket adapter. I filed the extra width off and it works fine, so long as there is a connection between the plug & socket.
Hope this helps you.