The best part of this app has been that it’s very user friendly! I have no complaints about how simple or intuitive everything was when setting up my account as well as sending emails from within their platform (which helped me get started!). It's also great for tracking analytics which gives you insights into who opened what in real time - so helpful with campaigns. There are some minor UX issues here but nothing major at all. If simplicity matters then use them because they do deliver quality services without any fuss whatsoever!! They're always responsive too if there were problems during setup/transaction etc.. And yes definitely recommend using these guys over other options out there like MailChimp / Hubspot etc. We've used them primarily due to ease of implementation and customization/integration we could achieve through our website design agency partners.