I like that it integrates well into our other products such as Salesforce Marketing Cloud/Data Studio Platforms or Hubspot CMS platforms for ecommerce sites etc., but also can be used independently without those integrations too! It requires some knowledge of Javascript/AJAX programming which might turn away from people who don't have much experience in this area - unless they've worked closely beforehand developing API's / web services (which is what we do!).
However even if you know very little about JS development there are tutorials online so getting up & running shouldn’t present many challenges. We use all three components together at work however only 2 were required by us but 3rd one could potentially see more usage here since its relatively easy implementation when working within an existing sales team structure already using these tools internally (SalesForce).