I like that DoneDone has team inboxes, task and project management all in one tool. It's a seamless tool to get things done. Inthink the web app is very user friendly.

The user interface and ease of use: it's accessible to non technical business users within the organization. The fact that it unifies task management, bug tracking, and customer support is really great. It allows to involve all the departements and corelates the output of each of them. The new task workflow routing is really promising. I find it particularly suited for IT businesses and Startups like us that prefer async email support over chat. Intercom is way too overrated, so managing the support via email is perfect for us and DoneDone covers that. Another advantage of email support: I we decide to switch tools again in the future, we don't loose anything and all the mailboxes are there. So the implementation is frictionless. As for managing developer's PR, it has Github native integration, I don't ask for more. A very well packed set of features.

Easily able to assign emails, tasks and get an eagle eye view of all things customer support. Easy learning curve.