The best thing about viral loops are that they create quality content for you! They can help with creative ideas to get people talking or sharing your product/service; creating videos & graphics which will go into their library so it's easy access when required (especially if there isn't much budget).
It takes some time getting used too - I think this may be because we're still at such early stages as business owners ourselves. We do not have any issues yet though from using them thus far!! So no problems here :) If anyone looking forward towards making sales online through video marketing then definitely try out viralloops. And trust me once its done well by us everything else would fall right behind :D.