This is one of my favorites.
It's got stuff for almost everyone I think, Straight M and F, Gay M, I think you can choose to have a F protag making Lesbian possible, Idr if any scenes have protag involved with both M&F sexes but there is A LOT of sex of a wide variety making Bis have double to fun. Beasts, Futa, Macro/Micro, Deamophilia, Belly Inflation, Orgies, Romantic, "Necrophilia" (zombies and ghosts), seriously there is A LOT of sex, many extreme kinks, and a ton of variety. I think I remember Sonpih has admitted that he is a gay man, this does result in a slightly more male favoritism but he is still adding females and female orientated content, which I applaud, I just couldn't.
There isn't really much a cohesive story or even a narrative that I am aware of but there are a lot of little stories to experience as well, quite a few minigames, and a number of little secrets and unique interactions to find.
The art style is a minor bother but its honest and accurate to the source material and its hard to imagine this game with any other art style. It does lead to a couple of issues, *cough cough* color adjustment *cough cough*, color adjustment was added fairly recently and it doesn't look good with anything but what the clothing it was added with, lace.
The only other thing that I dislike is the lack of customizability for the characters. Sorry, that is a poor way to phrase it but I can't really think of another way to put it because there is actually quite a bit of customization but to make this clearer, lets go ahead and break down customization.
When you create your character you choose between an elf or a human, you have 10 options for hair styles and 3 for the face, facial hair, body hair and 4 eye colors (6 for elves), elves also can choose ear and eyebrow size, allowing half-elves.
There are a few transformations: Tauren (Minotaur), Worgen (Werewolf), Demon, and Dragon (not particularly amazing, just throwing a retexture on the player model and a few extraneous model accessories (horns and penis models), but I do love it, especially the edginess of demons and the colorfulness of dragons.)
The biggest failing I think is the other more "minor" transformations. You can make changes to the player model with certain items and activities. You can thicken and thin your model (does look like it implies actual model size smaller and bigger), gain or lose muscularity, and change the size of the penis (og is ~7 in but can change from 5-9 in).
As a person who loves Size Difference, I want to become significantly shorter and/or taller but I understand why that isn't really possible. It would require a ton of work to change every scene to have variants for the smaller and larger sizes and a number of the scenes are already breakable due to what is already present. (If I remember which once I'll post again).
TLDR: Good Game, tons of Fap Material.