The best thing about content studio is that its easy to use, it's very user friendly interface which makes learning process easier as well i like how simple yet powerful this program can be used in my daily work of e-Learning development.
I dislike nothing at all since we started using content studio from our organization so far everything has been great but if you are looking forward to some new features then there might not be much out their because they have already released few updates recently. We were facing issues while creating interactive courses with different types of media files such as video clips or images etc., now after updating these tools we don't face any issue anymore.