I had my share of fun with this, but it's no masterpiece by any mean.
The graphics vary, sometimes they are quite good, sometimes they are quite bad, but mostly is good (if you are into giant disproportional boobs). The art style is nice, but they included even a big boobed grandmother, and sometimes it looks like the artist is more worried about the size of the breasts than with the face, and the face is the most important part of any character. The monster girls, in general, are pretty bad, that Slime is just terrible.
The sex scenes are repeatable but really short. Sometimes it even shows a pixel art animation before showing the CGs which I consider pointless since it's far better to see the CG instead than an animation of 64/64 pixels.
And worst of all, the game is grindy, really much. Even for scenes you already unlocked you have to acquire Lust to see them again. You have to farm affection with all the character, and a lot of it. With one of them, for example, you need to get 30 affection points, when you can get only 1 per ingame day, and after some time 3, but you can't increase her affection and the others at the same time. I only begin to actually have fun when I cheated using the cheat room in the basement.
The combat is based pretty much on luck. A boss or a strong enemy can kill you in 3-4 hits, and you have no reliable ways of healing (ways that don't require you to pay at least, and money is another grindy thing), so you must get to the boss intact, save before facing it, and pray for all your attacks hit to kill it before it kills you, because if you miss one shot, you are done.
I had my share of fun. The game has some cool CGs, but I don't think it deserves the high praise people are giving it.