First, let me say that I have been getting same day responses on all of my questions. I am not a pro and needed some hand holding. I am delighted with the support. As for features, I am also very impressed with the attention to real world issues. I have been trying to find an email extension that allows me to send to my contacts list instead of just my users. It has a throttle that limits the number of emails per second. I needed this as my ISP imposed limits on me. It has built in features that tells me about opened email and unsubscribe requests. First class product with First class support.