WordFly to Prospect 2 or MailChimp/MonkeyWrench

Hello! We are looking at exploring other email and automation platforms. We currently use WordFly and have just been unsuccessful in implementing automated campaigns and feel it is worth spending some time to see if other platforms would be better in the long run. I did a demo with Prospect2 and their Tessitura integration, and it seemed really great. I got the sense they offered a bit more support as well. I have a demo scheduled with MonkeyWrench soon.

Has anyone else made the switch from WordFly to either of these platforms? I'd love to get feedback from other organizations. Pros and cons? How much of an internal load was making the switch? Thanks for the help!