To those suggesting it's better to rely on customer feedback and reviews to know how to improve the design/UI of your app, what would you find more useful: 1)

To those suggesting it's better to rely on customer feedback and reviews to know how to improve the design/UI of your app, what would you find more useful: 1) A 1-star review from a random user, with a comment saying the app looks ugly. 2) A detailed report with screenshots and a list of places where your app fails to meet basic UI/design principles, made by someone whose job it is to give you feedback so that you can improve your app. I'll take option 2 every time, and most users from option 1 aren't going to even bother to complain - they'll just not use your app.