I like the app….the concept is great. I’d like to see an option to make it a standard screensaver vs. a separate application but I understand the limitations of the screensaver apps and it probably isn’t possible. It doesn’t seem to impact the performance on my 2013 MacBook Air in any way. I put it in my library/startup items so that it launches automatically at boot. I use this during the winter holidays and it adds a nice touch to your OSX desktop! The latest update puts an icon on your menu bar for easy access to preferences and controls.