I test drove several email services before deciding to go with Mad Mimi. They provide enough features to send a good looking email campaign, with a very intuitive interface. There aren't a bunch of bells and whistles, and you don't need to earn a Phd....
The email templates on Ungapped is what is most helpful because we are able to personalize emails all by ourselves for marketing.
I found that marketing automation and drip campaigns were a bit difficult to setup, and there wasn't a clear explanation of what was available in the free vs paid version.
Without complications in the use of the program, there is still a present problem with ungapped, many good factors and that help the professional and personal progress of the department and all the general company