What do you like best?
Mad Mimi is an easy to use, yet robust email marketing tool. Along with similar tools, the company offers a free plan. Their latest isn't as good as it used to be, but at around 2500 emails, it becomes a better deal in many ways than Mail Chimp (which is free up to 2,000 contacts, although automation is an extra $10/mo.).
What do you dislike?
On one hand, I like the very simple email design, which helps keep the look consistent. On the other hand, there are few built-in design options. And although Mad Mimi has many sophisticated features, Mail Chimp takes it even further. So if you're planning on using Advanced Segmentation for example, and don't want to switch between providers, you may want to start off with Mail Chimp rather than move your data over.
Recommendations to others considering the product
If you're a small business, or just getting started, I highly recommend this tool for its low cost and ease of use. If you're a highly sophisticated email marketer, you may want the extensive capabilities of Mail Chimp or one of the gazillions of other email marketing tools out there.
What business problems are you solving with the product? What benefits have you realized?
Mad Mimi provides a quick and easy way for a small business to do email marketing. It has most of the features of other email tools, from building a contact list, automating mailings and reporting, to some other pretty sophisticated email marketing capabilities.