A few days after the end of the rental period, the owner and the renter will both receive an email with the request to write a review about the booking and each other. You can also see a 'review' button on your bookings overview page.
Our reviewing system is fully transparent: you can only see the review that the other person has written about you after you have also written a review about the other person. If you still have not posted a review after a few weeks and the other person has written a review about you, you can still see it. But you can then no longer write your own review!