The ease of getting it installed with minimal amount effort from IT as well in our end users (traders).
I can't think what else would be great about this product now because we are happy so far but maybe their support team could do something better than they currently have done? We were looking at other products which had higher number functionality like ForexTrading platform or Meta Trader 4 etc. But then realized all those solutions costed money upfront while there was nothing stopping us deploying these kind systems within few hours if needed!