TPI Customer Testimonials TPI is most proud of the fact that TPI customers stay TPI customers. Our customers know they can trust TPI to be a valued Partner. But don’t take our word for it. Listen to them. http://www.tpi1.com/wp-content/uploads/2018/10/8.21.18-TPI-Chuck-Mike-Eric-Testimonials-1.mp4 . http://www.tpi1.com/wp-content/uploads/2018/10/TPI-MarcyKipDave-Scott-Combined.mp4