This is the best Shopify app I've used--not just review apps, but the best of any app. On top of that, the customer service is as good as any customer service I've ever had from anyone, online or otherwise.
This app is a complete review/feedback system that's extraordinarily well thought out from end to end. The biggest reason I chose it is because of its ability to consolidate reviews. Rather than having variants in a single product, many of our product variants are listed as separate products (for example, the same product with a different scent). We wanted to show the total number of reviews for a given base product. Judge.me allows you to do exactly that.
There are so many other features that make this app great. The customization of email templates, timing of emails, placing review widgets throughout your site, importing existing reviews, verifying reviews from online customers, etc. My two favorite features are the ability for a reviewer to upload their own photo, and the ability to submit a review directly from an email (currently in beta).
The support from PJ is nothing short of perfect. He's super friendly, extraordinarily helpful, and very quick to respond. My business lives and dies based on having stellar customer service, so my standards for customer service are unusually high. PJ exceeds even the highest expectations I could have.
Simply put, if you're not using this app, I believe you're crazy. It will quite literally pay for itself several times over. I feel a little weird that I'm so excited about an app, but I'm genuinely excited to be using it.