The ease of use when creating new programs or editing existing ones! It's very simple with this program to create custom training plans that are easy to understand by both coaches and athletes alike!! I wish it was possible to have more options in terms of workout types (ie., circuit) but overall it has been great so far. We've had many people coming into our gym who were looking for something different than what they'd experienced at other gyms. This allows them to try something new without having to worry about finding another place to go if things don't work out!