I used Interactive Brokers and they had issues with the e-mini, in ohuse. I lost over $5,000 and the guy there said that is ashame, but we are not responsible, which is what you agreed to when you signed up. He was right, but let me tell you, savign a couple dollars on future trades is not worth it, when you can lose it all PLUS on a system failure. DO NOT USE THEIR SERVICE if you have a lot of money in the market.