The PWRS Extranet allows me to review/preview offerings from all of the manufacturers and suppliers of model railroad equipment from one location. There's no need to visit multiple manufacturer websites to search for items. It's all in one place. Setting preferences allows me to focus on just the items that I'm interested in - favorite railroad(s), the scale I model and the time period I model. Ordering and tracking orders is easy. This is a very convenient way to do all my model railroad shopping and ordering. I recommend it.