Harmonia's beautiful presentation and fascinating premise is what drew me in and kept me reading, and the experience as a whole was a good one. 19th Century Utopian literature and the movements that grew out of it are an interesting subject, particularly due to the social commentary that we can draw out of it in hindsight. Harmonia reads and feels like a true academic's journal with its footnotes, asides and even comments on comments, each part and story beat quite literally unfolding one after another.
However, it must be said that despite being a work of interactive fiction it is a thoroughly on-rails experience, with only one significant choice: the ending. Don't get me wrong, I was interested in the story and its characters, and even though a couple of reveals were a little predictable, I felt that it made narrative sense and was overall an enjoyable read.
All in all, Harmonia has a lot going for it and I recommend you give it a try. If you're anything like me, by the time you're done you will have picked up not only a respect for the design and the writing but a healthy interest in the history of Utopian communes as well. Four astroliths.