Kgirls already rate and talk about clients so it's not a foreign concept.
What reviews do, both ways, is to encourage feedback. So I would learn what I could improve on. I hope kgirls reading their own reviews do the same,and not get fits if anger if they get a bad review.
There are a few caveats however.
Ideally, the review of us should be independent of our review of them. It cannot be rebuttal reviews, because those are the worst kind. "Oh you gave me a 6 for face so I'm gonna destroy you in a review" should never be a thing.
Second, badger, I would argue that my session doesn't really get better if a girl rated me high. If a girl doesn't have the skills I desire or if she's way past my weight limit range, etc no review would change my opinion of her.
I don't really see it as a "two sides of the same coin" thing. If a mongers review is bad, and if kgirls review of monger is bad, then it's his word vs hers. Now, in rocketmans world monger always has the tiebreaker, but to other people it doesn't make the decision easier. This would probably make it easier to dismiss any deserving bad reviews,which is something that we definitely do not want to do.