I gave Sicfex Swiss International Commodities Futures Exchange a fair chance. After since I retired last year of usage, I can say with confidence that there are far better options available. The interface is clunky, the fees are higher than competitors, and the customer support team seems overwhelmed or understaffed.
Pros: Transparent fees|Segregated accounts|No hidden fees
Cons: Desktop app not available on Linux|Research section could be deeper