What kills me about the Taimanin series is that it has these utterly cool designs for its characters, but it's the most heavy hentai series you'd run into.
That just makes it even better for me. Let's not kid ourselves, the reason we watch anime is to see cute big-eyed girls getting ravaged by tentacles and gang-raped into silly ahegao faces.
That's a reason for me not to watch it, but I guess we all find different ways of enjoying life.