Our company has been using AcyMailing for 9 months-- started with Starter version after swtiching from another product. We now use Enterprise version using the variety of plugin integrations (Jevents, CB, VM, etc.) and have built 100+ autoresponders and managed thousands of subscribers with no problem. Only one technical issue surfaced, a conflict with a plugin from a different developer, and the AcyMailing team went above and beyond to resolve the issue within minutes of granting FTP access. This product rocks and the support is outstanding. Couldn't rec any higher!!