I'm interested in comparing JMRI Operations to ShipIt and RailOP for computer-generated manifests and switching lists. I've previously used ShipIt and am currently using RailOP. RailOP is OK, but doesn't have much support from the owner. It does have a very active user group.
I would like to learn how users feel about JMRI Operations. Does it have a user group? What are its strengths and weaknesses?