Hello, No criticism of Apple intended - just something I found that I thought I'd share. As we know, the 5S rear "iSight" camera can record 120fps videos and play them back at 30fps for a slow-motion effect. It's a very nice feature but here are a few things I've found. - You can only slow down one portion of the video. You cannot speed up, slow down, speed up, slow down. - It appears to be a bit of a lottery whether or not the slow-motion effect stays in place after the video is moved to another device. I know if I import the video to my iMac (running Mavericks!) then it plays in Quicktime with a 'SloMo' button I can turn on and off at will. - Videos recorded using the SloMo mode are taken at 720p and appear to be quite heavily compressed. The quality between these and videos taken with 'Video' mode are light night and day. It's tempting to take all videos in SloMo mode 'just in case' but be warned that the quality really suffers.