Error prone plugin and clunky platform

Our organization has experienced constant issues with the Constant Contact WP plugin and platform. Constant disconnects, issues after each update, lists randomly stop syncing or disappear, new signups not being allocated to their chosen lists during sign up etc. The plugin and platform also lacks a lot of dynamic features that other competitors provide. We rely heavily on email signups for our marketing and this platform/plugin are noticeably hurting our efforts, which is why we are finally making the move to another provider.