While logged in, the simplest way to edit your user review is to copy your existing review and paste it into the review submission box. At this point, make your changes and make sure the score on the slider is your desired score before submitting the edited review. We will eventually upgrade the system to make it simpler to edit and delete your reviews. We'll also have a page listing your individual product "ratings" and other statistics detailing your participation history (Currently, if you click on your username, you can view all of your user reviews, but not the bare ratings).