This extension came along for me at exactly the right time. I have a new client that has at least three different requirements for registrations for the same event. Paid Registrations, Free Registrations, and Custom Fields. This product does all of this (and more) easily. I was able to install and play around with the extension with no trouble. Any questions that I had were answered promptly. Thank You! For such a great product that is extremely inexpensive. Tuan Rocks!