Craft, from the company of the same name in Tel Aviv, is presented by the vendor as a better way for Product Managers to manage and plan their products in agile environment.
Craft is really well suited for any size design team - I have used it within a team of 3, and within a team of 30. It helps with collaboration within the team, and between external teams through 'sync' with Invision. It increases efficiency of using Sketch with things like 'data', 'duplicate', and 'stock'. These tools not only make designing faster, but also more realistic, allowing us to 'test' our designs sooner.
It's definitely an improvement over our old Enhancements list that anyone could add to and just collected dust on a Share drive. ProdPad allows ideas to be sorted and archived, plus let's people comment on ideas - so it's pretty obvious is something is a good idea with lots of support or just some crackpot theory.
I'd like to see a better way to handle archived/won't do/already released feedback or ideas so that you have a bit of a history of requests and what has happened to them.
Excellent quick response from team members, great opportunities to engage in design discussions for upcoming features, never had a bug last long or go unresolved. Overall, support is one of the best parts of working with ProdPad.
Craft was originally developed in response to ExpressionEngine's shortcomings. While ExpressionEngine has caught up in some regards, it still looks and feels a bit unpolished by comparison. Additionally, ExpressionEngine's vendor has never gotten UI right - not on their website, nor in their CMS. Craft remains easier to use, more polished and provides a wider feature set in its base install (without needing plugins). As for WordPress - while I recognize its massive popularity, I find its reliance on themes, third-party plugins, along with security shortcomings, make it a poor fit for the larger custom projects we build. On the other hand, if you want to throw up a passable website in a day, you can't beat WordPress.
We were just capturing ideas in an Excel workbook, but that forced ownership to a single user for changes and updates and there wasn't any direct integration with project backlog. We actually didn't select ProdPad, a new VP came and brought it with him because it worked so well at his last place. Everybody here jumped on board, though.