I have been using this product now since last two years to manage my inbound leads pipeline which has increased manifold by its use! Nothing much as of yet but it's something that i would like to mention about their support team where they try hard at times when you are not able to get through your own network or email channels (as sometimes happens with me).
They seem very keen towards solving issues related to any issue one may face while dealing with them especially if there was an error happening during login itself!! So far nothing major comes into mind however we solved our problems regarding data sync from other systems such as Hubspot & OutSystems etc and managed all our customer interactions via chatbot also!