Questions about Dukascopy and foreign brokers

I have read tons of good things about Dukascopy. In the future I might consider them. So I would like to know of experiences with them if anyone cares to share.

Mostly, I want to learn about what it is like to deal with a foreign based broker instead of a US based broker. I am US based. Also, just what kind of guarantee or protection can I expect from their regulatory agencies like the ones Dukascopy belongs to.

Here is their direct quote -
Dukascopy Suisse SA, as a Swiss financial institution based in Geneva, Switzerland, is regulated and controlled by the Swiss Minister of Finance through ARIF and the Federal Finance Administration (FFA) for financial intermediaries.

I have heard that anything guaranteed through Switzerland is worthless. True? False?

I am interested in learning and getting smarter. I am not switching brokers or making any changes right now.