A few things I thought it would be important to mention:
1. I have never personally used a GoPro branded camera. This thread is not meant to knock GoPro or state that the SJ4000 is better (or worse, or the same as a GoPro). In fact, if money was no object I would have the top of the line GoPro and every accessory possible.
2. The point of this thread is to simply share my experience with the SJ4000. I am not a professional photographer, videographer, or editor. I am just a guy who likes cool toys, but has a wife, two dogs, and as of April two kids (so I am on a budget).

[doublepost=1453688937][/doublepost]I figured I would go over the SJCAM app for those who are interested.
The app is a great feature for this camera. The app does act as a viewfinder for the camera. That being said there is a slight (1-2 second) delay between the camera and the app. This isn't a huge issue because the camera has a built in display on the back.
The app also works as a remote for the camera. You are able to switch between still and video, start and stop recordings, and set the timer on the camera.
My favorite feature of the app is that it allows you to review the footage that has been filmed and copy it to your phone.
The app connects to your phone via the camera's wifi output. This can be a little clunky (have to go in to the Settings on your phone and connect to the wifi network, then open the app) but it is what it is. The app is not a necessity when using the camera, so it does not hinder the user experience in my opinion.