What do you like best?
This is a free open-source 2D animation software "developed" by Studio Ghibli. It's incredibly powerful and it's free!
What do you dislike?
The interface could be a little more aesthetically pleasing. It basically looks like an old Windows application. There's also a steep learning curve with very little sources for learning.
Recommendations to others considering the product
You really have to be willing to learn how to use this program on your own through a lot of trial and error. Unlike much bigger name software (think Adobe AfterEffects) there is very little support, and very few tutorials to be found on this program. But if you're willing to push through, you'll be able to use the open-source version of a tool developed by the masters of animation.
What business problems are you solving with the product? What benefits have you realized?
I use this software primarily to learn animation and for freelance projects. This software has the capabilities I need for full-length animation feature films with way more tools than I can ever imagine using on my own, and you really can't beat it for the price.