CPAN ratings is nice. I like this feature.
However they round badly IMHO. If you have one vote less than 5 it becomes impossible to have a full 5 stars on your module page on search.cpan.org.
For example, DBD::SQLite has 5 votes. 4 of which are 5 stars, and one is 4 stars. That should result in 4.8, which should be rounded to 5.
But it gets rounded down to a 4.5.
Of course it may just be too much pride that is making me think this.