They have the most flexible segmentation builder I've ever used, with a ton of custom customer segmentation options available powered off of our Segment events. The support team has been super quick to answer any of our questions while we were starting our implementation and the documentation was super helpful as well. Review collected by and hosted on G2.com.

The A/B testing functionality is still being developed - though we haven't had much need for that yet. Review collected by and hosted on G2.com.