I grew up on DOS, so I'm comfortable with command-line tools. But I would enjoy this tool much more if it had a GUI (hence my not giving it a perfect score). I got it primarily for adding a custom thumbnail to MP4 files, and for that it works just fine.
Review by awgie
Jun 15, 2015 Version: 0.9.0
OS: Windows 8 64-bit Ease of use: 7/10
Value for money: 10/10