It's not bad, but it's not great. Voice acting has a tendency to be a little overboard. Story seems good, but nothing gets finished. Here's my biggest complaints.
First, like all Darker Projects, it just ends. It's doesn't finish, or come to a completion point, but just suddenly ends. You know there should be more episodes, but nothing.
Second, also like all Darker Projects, they don't tell you if it is part of another story. Therefore I listened to Darker Projects Autumn first, only to find out that it was a continuation of this story.
Third is the ridiculous amount of time between casts. Which also seems to be usual for Darker Projects. I assume they are an amateur group, if they're professionals then..not so good. All that said it's free.