I like that it is easy to use, has many features (like A/B testing) available for free as well! There are some limitations in terms of what you can do with their platform - but this may be due more so because we're not familiar enough yet wtih how they function internally compared tp other platforms out there such us Optimizely or Google Analytics 360 etc.. We've been able get our most important metrics up quickly without any problems at all thus far by just plugging things into them straight away via API's from GA & UTM providers which have worked wonderfully since then!