Thanks!

Honestly I'm not quite sure how the rating system on the site works. If you look at the scoring section of the review it says 9, but I never specified 9. I put 8 when it prompted me, and it showed up as 80% in the "breakdown" area, so I need to talk to the admin about making that a little easier to use. I think the 9 comes from the number of pros and cons I filled in.

If you're asking how I chose the scores: I just weigh up the good aspects of the product and the bad aspects of the product, and apply a score based on that.