We have created a couple videos (here and here) to help you show your friends and family how the Puritii APS works. You can also do a live demonstration using a particle counter. When demonstrating the Puritii APS at ARIIX events, we have used a particle counter called the Dylos DC1700 from the Dylos Corporation. The company also offers the DC1100 model - this version isn't battery operated like the DC1700 model, but it is cheaper. There is also a wealth of testimonials, pictures, and videos from other representatives on Facebook.