The best thing is that it's free! I have been working in other programs like Adobe After Effects or Corel Draw but it's very hard to make something good with them. It's easier to create animations with synfig. You can edit all your work with this software so you don't need to save everything as an image sequence. You can add many different effects on your animations to give it more life and realism. This software has a lot of tutorials about how to use it, so there are no problems at all. I recommend this program because it's easy to use and gives you complete control over your animation. It's very fast and you can easily do what you want with it. If you're looking for a great tool to animate your projects, then I suggest you to try this program. I am currently using this software to animate my videos.