Robust listserv plugin

Robust listserv plugin with many valuable features. Documentation is thorough and better written than many plugins. You must follow the documentation steps carefully as it is easy to overlook a critical instruction. However, the product works really well when properly installed. Reliability is great.
Response to support requests is uneven – sometime fast, sometimes slow. Even with the paid version (Society), it can take up to two weeks for an acknowledgement of a request for technical assistance. Support itself is excellent once it responds. Holger is very knowledgeable and thorough. All issues submitted do get resolved. I particularly like the way he explains what the issue was and what he did to resolve it. This teaches me and I feel better prepared to do my own troubleshooting in the future.
I really like the product and the way it performs.