I hesitated to play this because the plot was just too similar to the movie (and book) "The Martian". But actually, they're quite different. That story is about a hero (even if he IS a scientist :) ) overcoming incredible odds. This story is, ultimately, horror.
I liked how far I managed to get without consulting the walkthrough, and I liked the idea (although not the reality; I tend to play in silence) of the soundtrack.
I disliked (as always in parser games) wandering around in a repetitive way, trying to figure out where the writer wanted me to go. As a completionist, I disliked the long list of emails, because I felt overwhelmed. I also found it a boring way to get across a story, especially when sorting through junk mail and other irrelevancies (although Charlotte's thoughts were always interesting to me).
I'm not sure how else the story could have been handled, but still - a happening-right-now adventure is always more interesting than knowing your character is just sitting in a chair, reading.
She was also quite passive, which realistically I can't blame her for - but it made the story less exciting. Some of the writing was a little disjointed and some was excellent (which makes me suspect it needed more editing than it got).
The end was genuinely eerie.