Each review I have on an artist page is given a rating. The rating system is broken down, simply, below:
0 Stars - Unlistenable
1 Star - Horrible
2 Stars - Poor
3 Stars - Two or three interesting tracks, otherwise bad
4 Stars - A few good tracks
5 Stars - Mediocre, half of the album is good
6 Stars - Solid and interesting album
7 Stars - Good album, maybe two or three bad tracks
8 Stars - Great album, majority good tracks (maybe one or two bad ones)
9 Stars - Excellent album, maybe one bad track or small issue (like mixing / arrangement)
10 Stars - Perfect album, the best of the best