I spent a couple months testing out all the various event modules. I was convinced I could get a free one that did what I wanted. All of them had a fatal flaw, the RSVP capabilities were either non-existent or lacking. I saw the Zap Calendar demo and I knew it was what I wanted. It is so feature rich and complete. I wanted to change a part of the RSVP plugin for my specific situation and the developer actually rewrote part of the plugin and emailed me the new code so I could have it before my site goes live. That is the level of dedication he has to making his product better. To me, that alone was worth the purchase price. So many features, such a great look. Since my site is for a social group this was the most important component, and I can say for a fact that this component alone completes my site so perfectly. Many thanks to Dan.