Could be great, but still problems
The app is really great for previewing designs. However, there are a few major problems:
1. It constantly disconnects. The only way I have found to make it work is with a dedicated lighting cable. Even then, I constantly have to reconnect to it or restart the app.
2. The order of the artboards in Mirror is inconsistent. Inside of sketch, if I export the dartboards to a PDF it will put the artboards in top-down order. However, when previewing in Mirror it will put the dartboards in bottom-up order. This causes me workflow issues.
Mrbrettb about
Sketch Mirror