The AJAX Registration page works perfectly, and has integrated with my template quite well. The added bonus of having security features such as Captcha also made this extension a huge A+ in my book!
Extension aside, the developer has been available 24/7. I've had a few technical questions in integrating a few ideas and also some general questions - questions were answered same night. Support provides real-time access behind a few chat programs (e.g. MSN)... I found this to be wonderful.
Thanks again for the great work! Keep it up!