After working with Zap for a while, I had a problem with the component. It was clearly some conflict within my other products, but I could not work it through. I emailed Dan and he was quite responsive, cordial and methodical. When I gave up trying to get it going he graciously stepped in and fixed it. As suspected, it was NOT a problem with Zap but a component conflict. I was very pleased with his response to my problem.
What more could you want? All the features in a calendar and a mature company standing behind it!