I work on a very dynamic and plural team.
This means we need to get all the deliverables synced and updated for everybody.
UXPin simply allows doing this in a natural and automatic way.
Multiple designers (UI/UX), QAs, PMs, POs can access the file at the same time an see, in real-time, all the work being done.
They can add documentation, comments, approves, and do discovery in a seamless way.
The interactive prototypes can be done while working on the layout, by other team members.
And if you need to add conditional decision on the flux of your app/website, UXPin allows you to use variables.
Does the user is logged in? If so, goes to this way, if not, goes to this other way.
And the big triumph: the design system.
UXPin auto-create a complete design system based on your components from your layouts.
You can remove/add more instructions and elements from your design system and can share/protect the layouts, documentation, prototype, and design system with anyone.
So basically, you can do all the processes and management of your UI/UX project trough UXPin. Review collected by and hosted on G2.com.