Yes, eToro is a reputable site. As of 2014, it is registered in the European Union, Australia and the United States and is licensed to trade futures in those jurisdictions. Its model of taking a commission on trades rather than charging up-front fees is common across similar businesses.
eToro is a social investment platform designed to allow users to follow others' investment patterns and copy them if desired. Users copy the investments of successful members, a strategy that eToro advertises as having an 80 percent success rate. Successful traders with large numbers of followers make additional income from eToro, which pays them per follower.