It is very user friendly, it has all features we need as business users like sending mass messages, archiving old conversations etc., I also love how well-designed dashboard of this app makes things easy to understand even with no technical knowledge. In terms of UI & UX they are great but there should be more options in customization section (like color variations). We use iTransor when our clients send us some information that could not go through official channels due to security issues or other such reasons which cannot wait till next day atleast. So using the chat feature from their devices was our only option now until then.