I found a simple &fast way to get your Slow-Motion videos onto your computer. This method is also without applying an effect, but by simply adding a blank text.
Use the iMovie in app editor, then click add text, get rid of the sample text and then save.
The video is saved now and can be easily shared, however when transferring to the computer it is still playing back at 120fps (or 240fps for iPhone 6).
So far, I only found one simple method that will allow you to transfer the slow motion video with it being 30fps.
Download the app iFile free. Tap the bottom right arrow to import a video from your Camera roll into the app.
The video will be imported. Now you just have to connect your iPhone to iTunes, go to the app section, and select iFile Free and drag the video to the desktop.
That's it, you have your slow-motion video with no compression in 720p.