The Star rating system is so flawed for the kind of addons that this has developed into...
Conceptwise, it is a clear 5.
Ease of use, an even clearer 1.
For the vast, vast majority of users the addon is now just a trap that they might waste much time trying to figure out. Until such a time it somehow automates the process of setting up and maintaining compression services again.
Further, those who have no problem setting it up are unlikely to really need the star system to find their way here. They will come here via link from articles/blogs/forums and similar.
So while it might not feel particularly fair, the only reasonable "Star Rating" is a 1.