Everything is reversed on the projection?

If you are projecting from behind a surface instead of in front of it the resulting image will be mirrored. Check your projector settings and on most projectors, there is a “Reverse Projection Mode” that will fix this issue.

There are black bars on the edges of the Projection?

This app looks best on a Full HD 1920x1080 16 x 9 screen, but phones and tablets come in all shapes and sizes. To keep the image from being stretched or distorted on your screen there might be blank, black areas to fill in the extra space. This is normal if the aspect ratio of your device is not 16 x 9.

Chromecast is stuttering or of poor quality?

Try moving your phone/tablet closer to your router or setting up your TV/projector closer to your router. If all these devices are within 15 feet of each other they should connect fine. Also, you can check that they are connected to the same Wi-fi network channel, either 2.4GHz or 5GHz. In rare cases, some other device could be causing interference. Also, if your phone/tablet is a model not optimized for casting, it could be having issues processing, so you may want to try a wired connection or try casting on a different device.