Not so great.

This a app is pretty cool and very simple to use but I only have one problem with it. After you are done editing a video, it gives you the option to save to camera roll, upload to YouTube, Instagram, etc. whenever you save the video you just edited to your camera roll, it changes the timing on certain effects, and if you retry you get the same result.. Besides that its a great app, just needs an update to that problem.

Slomocam buyer about Slow Motion Camera Extreme