The ability to create custom dashboards with all sorts of metrics from different sources in one dashboard is great! It's also very simple compared to other solutions I've used previously (such as Tableau).
There are multiple layers involved when building an interactive report which makes some things more difficult than they should be - but this could just be something we didn't grok well enough yet at our current stage or level of expertise? Also sometimes you need several steps/fields added before getting results back so there isn't always immediate feedback like using PowerBI would give us if everything was perfect :) Great tool though! We were able to have quick insight into important KPIs without having someone spend days pouring through reports every week etc!