In my experience, Mailchimp is a reliable email marketing tool. It has a simple and intuitive interface that makes it easy to create and send emails. The analytics feature is helpful in tracking the performance of campaigns. However, the pricing can be a bit high, especially for those with larger email lists, and the automation features could be more robust. Overall, Mailchimp is a decent choice for those looking for a straightforward email marketing solution, but there are more advanced tools available.