I waited a long time to write this review. We've used Judge.me for quite some time now, and I can say definitively that it is without question the greatest value of any review app on Shopify. Their feature set is robust, it integrates with tons of other apps, allows all the customization you could want, and has enough built-in presets so that a novice can get it set up with ease.
They do not twist your arm to get you to leave reviews here unlike many other apps. They simply provide the best service you will find anywhere on Shopify knowing that eventually you will come to leave the review they deserve.
I have had probably half a dozen silly questions that I filed support tickets for, and all of them were answered quickly and professionally (none of them were the fault of Judge.me or the result of any bug). I once sent them on a wild goose chase to debug the Judge.me app, only to discover it was another app I had installed that was bugged - which they identified.
In terms of app review features, I don't have any idea why anyone would use Yotpo when this is available. Wait, no that's not true. People use Yotpo because it's massively hyped with a sleek marketing video to entice gullible newbies to pay absurd recurring+usage fees for something you can get here at a tiny fraction of the cost.
Judge.me quite literally has the same feature-set with better support at a fraction of the price. That's not hyperbole, that's fact. Do yourself a favor and go with Judge.me, and if you already have another review app it's probably time to consider migrating.