0.8 build and full disclosure, I played it with the mods. This is now one of my favorites.
Things that stuck out to me:
The pacing is fairly balanced. It moves slow enough to develop a good, cohesive story, but not so slow that you find yourself wondering where the sexual content is. And the story is pretty good. Demons and succubi have been done many times before, but this is easily my favorite take on it as a primary storyline.
Along with the story, the humor is nice. It's not a comedy routine by any stretch, but a light-hearted romp through the adventure that makes you laugh on occasion, within the context. Example: I think my favorite choice in the game was "smash their face in or smash their face in lightly". They didn't ignore that the MC is a demon, even with the "nicer" choice and instead used it to crack a joke. In addition, there are a few 4th wall breaks, but IMO, they're done well.
The artwork is DAZ, obvious enough. The renders are pretty good. What I liked is the attention to detail that most of the scenes show. Example: The MC is walking around with a giant cock and it's evident as applicable in almost every outfit that she wears. That's usually overlooked.
As for the characters, I found them to be pretty likeable. They aren't cookie cutter designs either. Each has their own look, both bodily and in clothing choice, and more importantly in personality. Sure, they're all a bunch of horny sluts, but that's not a downside and there's more to each of them than that.
The Dev claims that English isn't their first language. Honestly, their English is better that numerous games made by people that have English as a first language. It's not perfect, but it's always nice to have very few issues with that.
Mechanics and replayability: Most choices matter over time. Different scenes have well... different scenes if you choose differently. Want to solve all your problems with violence and deception, the demon way, or try to at least be a bit nicer? It works out well. Several options in a few places on the sexual content as well.
Minor notes:
Good amount of content. When I thought I was almost done looking at the latest walkthrough, I had another two hours or so.
It has music. Always a nice touch and it was a different from what I usually hear, so that's another plus.
Bug free for me at least. Always awesome.
The only gripe I have is that you can't rename characters; which always makes things more fun. And, honestly, that doesn't even really count as a gripe. IMHO, it really is a well made VN.