Constant Contact: Email & SMS

We have used Constant Contact for years, so when we moved our web site hosting to Shopify, it only made sense to add the connector between the two systems. It is nice to have data flow from Shopify to Constant Contact, though it would be nice to also have data flow back from Constant Contact to Shopify. Certain lists in Constant Contact are useful to have based on Shopify activity, but again it would be nice to have more control and more robust features to manage how data flows. We could get by without the connection, but I wouldn't want to.