Node Limit - Node reference rule?

I have a content type called product, it has a add a review(content type) link at the bottom, using node reference url.

I want to create a rule that allows the user to only add one review per product.

I tried if roles x,y,z and node is review, and reached node limit 1, page redirect, and post a message..

but this doesnt seem to work, im assuming it had no way to know the node ref that the user has already done a review for this content.

any thoughts?