Overall Satisfaction with Campaign Monitor
In my previous role I worked for a marketing agency. We used Campaign Monitor (CM) for basic email marketing campaigns. It was very easy to use and give customer access to for managing, executing, and tracking campaigns overall. CM addressed the need for an email marketing tool that has general ease of use and is self services for our clients.
I think campaign monitor is easier to use on the agency level as well as from a dashboard. MailChimp seems more rudimentary to me for some reason. I also really like the co-branding you can set up for your business with campaign monitor to track to your own website link as well as color scheme your dashboard to your brand.
I think for an email marketing tool, Campaign Monitor is spot on. It does what you need it to do and is very easy to use. If you want basic outbound email marketing overall this is the tool to use. I like it much more than other email tools out there. It is less appropriate when you need a more robust inbound solution.