I am a solopreneur and didn't need as much of the collaboration tools provided, but I found that this tool was worth it for quite a few reasons...
1. I really like the white label client portal. I needed a contract repository and it was awesome that I could rename the widgets...so rather than just having "Files" I now have "Contract Repository". The branding looks great so it fits in with the rest of my site.
2. I like how I can customize this so I only show the widgets that I want to use. It helps clean up the view.
3. I like how you can show your task list in so many different formats. I've never used Kanban before and really like it.
4. The support team is awesome. I was having some issues with a basic task to load my logo for the branding and they did it for me...was really appreciated!

This is probably my favorite purchase so far on AppSumo. I love it.