ProdPad is built exclusively for product managers and every feature there serves their process. From setting objectives, planning initiatives and ideas that can get you there.
Personally, I liked the feedback and contact management the most. It allows to use ProdPad as CRM of sorts to maintain the list of product champions and keep the close contact with them regarding product feedback and ideas testing.
ProdPad is visually appealing, which makes it easier to talk about with stakeholders or present in a meeting. It also forces you to stick to a framework (in my case: Now/Next/Later), which prevents you from waffling!