ICE is definitely a big exchange. I don't trade their product because data fee for the charting software is rather high. eg for Esignal ICE US data fee is $116/mth, ICE Europe financial $116/mth, ICE Europe Commodity $116/mth. further, you might have to pay data feed for your trading platform and that depends on the broker.
I used to trade ICE products but stopped due to their exorbitant data fees. TD Ameritrade stopped offering all ICE contracts because they are a douchebag exchange.