I added voiceover to an app last year and found it to be a pretty easy process. Not only did I learn something, it felt good to add this accessibility feature. More people than you think use voiceover! Anyway, this post gave me a new perspective and shows how you can use voiceover to help determine if you have visual issues in your app. If it seems weird in voiceover, it probably isn't ideal in your design.
The Voice Of… iOS by Jeroen de Vrind