I just finished Katawa Shoujo, except for going with Kenji and the bad/neutral (for the most part) endings.
I have to say, it was certainly an amazing experience. It's got so many feels, good and bad, and is also a great source for inside jokes (lemons, amirite?).
Walking away from the experience, I'll be taking the lessons to heart (no pun intended), and probably go back and read through some of the routes again, as it really is, if you think about it, 5 novels + a short story in one.
I don't know what I expected to get out of writing this, I just hope some people share my view of this amazing piece of work.