What do you like best?
Transparent languages has a lesson for everything, and I don't think I'm exaggerating. If there's a topic in another language that'd you'd like to learn a plethora of minute details about, Transparent Languages is the correct software for you. It has tons of in-depth lessons on niche topics in different languages. It's quite comprehensive, and offers a variety of teaching methods (from writing, to speaking, to reading, etc).
What do you dislike?
If you're in an environment where it's difficult for you to speak aloud and you need to skip that option, it becomes a little stifled in terms of the breadth of the lesson (you have to skip a good amount of the work). In addition, because the topics are so niche and you can jump all over the place, it's difficult to see solid progress. However, the depth of the language somewhat makes up for this, because there's nothing you can't learn.
What business problems are you solving with the product? What benefits have you realized?
It's not so much a problem, but we use this software for the personal development of our employees. We encourage them to undertake personal development projects, and several individuals indicate that learning a language is a skills that they would like to develop. It allows our employees to feel more fulfilled at work and like they're actually moving forward in the marketable skills that they possess, which leads to a more positive and fulfilling work environment.