The simplicity of this tool is great! I can easily add my subscribers to it, send them emails that they actually want, without having to worry about spam filters etc. It's also easy for me as an admin because all you have to do in order to get started using your own domain (or subdomain) is go through one simple step - adding DNS records. You don't need any other tools/services like MailChimp which are quite expensive compared to reach people email marketing service. So far everything seems very good but if there would be some improvements then we could definitely use more features. We've been able to improve our subscription rates significantly by just sending out regular newsletters via their platform.