I've come across this one so many times and passed over it because the game banner/logo/whatever you want to call it...I was like, dayum, these girls are FUGLY! After reading some posts about the game I decided to give it a go, anyway.
So, back to the fugly sisters...once you get into the game, they don't seem as ugly as the game banner makes them out to be. In fact, their appearance started to grow on me. As others have mentioned, it is kind of nice to see someone break out of the norm as far as character models.
This is also a pretty artsy-ish looking game. It really helps set the mood for various scenes.
The thing that really shines in this game, better than 99% of the VNs I play, is the writing and the story. This is probably one of, if not the most, beautifully written VNs I've ever played. I really felt close to each of the characters and what they're going through. On top of that, the dialogue seemed so natural and flowed very well. With most games that start with a warning about being "slow burn" and "more about the story", you would expect to be hit with non-stop walls of uninteresting text. This VN is not the case at all. Not once did I feel like I was encumbered with never-ending dialogue or inner monologues. In fact, I was pretty caught up in the story itself and enjoyed reading, which is something I can't say about most of the VNs I've played. Also, you are rewarded when it gets to the sexy-time stuff. It's definitely slow burn, but the build-up is actually nice and works well.
There are various kinks/fetishes you can explore and none of them are forced on you, either, so that's really nice for people who aren't into certain things.
My only complaint is the bath scene with the sisters while the family is one vacation. I felt it was a little bit longer than it needed to be, but that's probably just my preferences because I don't really get off on lesbian-only content.
Either way, this is definitely a high-quality game with a rich, interesting, story and I'm looking forward to future updates.