So far this is working great. It's clean and easy to use. Helps keep my projects and collaboration organized in on place. I think the front-end can use a little bit more improving. I'm not starving today so I gave it 4 tacos, mainly because:

1.) There is no way to export projects and import like just about any other plugin out there. Seems I would need to go into the database, and I really try not too.
2.) Doesn't seem to be a way to edit notification emails ( I don't like the current design, seem outdated)
3.) I know other commented about this, now my license says it expires in 10 years. I also bout WP User Frontend from here, that license says it expires in 50 years. I think everyone will feel better if the WP PM was also changed to 50 years or 100 years, since it seems that it can be changed.
4.) I wish there was a way to link the files section of a project to Microsoft OneDrive, or Google Drive, DropBox, S3, etc. for those projects that have tons of file or huge design files that I don't need/want to upload to my WP site.
5.) No mobile app!
6.) No sync to Gmail/Outlook calendar