Unfortunately, I have to open Skype once a week to meet a friend of mine who cannot afford another messaging tool. And it shows a nice dialog asking if I'm enjoying using Skype.
Well, I'm not. Surely, it obscures everything else and prevents me from using the program. Closing it just delays the problem for the next time when I need to call those person again.
Ok, if I submit I'm happy, maybe they will live me alone, I guessed one time. Surprisingly, there was no any button for that. After some time spending on clicking and scrolling to and fro, I found that the dialog is scrollable!
Indeed, the yellow stars take so much space that the most important thing -- the rate button -- went somewhere down and became invisible to me.
Great user experience.