Decent group implementation... but is still in dire need of improvement. Having a group calendar that has BOTH public and private group view access would be a great enhancement.
As it is, the add-on is purely private for everything or wide open to everyone. That defeats the need of groups that have private internal processes, but may have a public gathering that is not restricted to members. As it sits, I am going to have to look at finding yet one more add-on that will allow the creation of events that the public can see, when it should not be that hard to implement that process in this add-on.