Well, In my store (Also Kitsune shans store because he is my partner and he is my rigger) I have many type of reviews: From 1 to 5. We are lucky you can flag unfair reviews, but sometimes I get 1 star review from some customers because in the item says "No mod" and they want it "mod". They were happy with everything, and they said it in that review. But they left a single star. That mark my release forever like: The worst thing you can ever find.
And that's is unfair. I sell thousands of items, but rarely get reviews, and when I get is just for ask things or for suggestions. When suggestions they review with 5 star usually, but when is something like "mod" rights, they left me a "beautiful" 1 star. :_D
So we need a better review system. And not force, but just ask to the customer to please left a review.
A review like Kitsune listed above will be nice, add many reviews in one such: Fitting, texturing, render cost maybe.... Will make reviews more fair.
In furnitures can be: Texturing, details, land impact, pose quality.