To make it short.
Pros.
The art is the best i see around, by far, i am writing this as a CG artist, the anatomy is very well done, no strange donut butt, no strange boobs, the skin have the correct amount of details on the maps, and the channels are well done, the lighting is great in most scenes, but even if the light is not great, the shader make for it and the scene becomes nice, there is a attention to details.
The characters can be a little strange at first, because they have a unique look, take sometime to adjust the view to it, but once this is done, the girls looks good.
The game put lots of mechanics, stats, almost like a rpg, i think this is good, but will be a con too.
The history have a nice base, taking pictures, this is nice, different, i like it, give some voyer feel that could be explored much more, the history is different from the same "i have a huge dong and i go to X place to fuck everyone".
Cons.
The art is so great that you almost forget about the gameplay.
The gameplay is not the best... you have to grind and grind the stats, money everything... i think this takes away the focus of the game, that is the pictures, a nice original idea that is taken away because you need to find a way to increase some stats... I am sure this could be solved.
The history... I am not a fan of this incest stuff, could make this a choice or something, but even so, i think the dialogue is boring, too long some times, without good information, and because of that, when i play it, i had to go back to read some stuff that i just skip, there is too many lines that don´t add nothing to the history, i really don´t feel the need to read the lines, most just look a waste of time.
I like most of the plots, but i just don´t had the incentive to read everything...
The player stats could be a huge yes here, but i think the game needs to improve that, the grind kills it... you need sneaking skill to take pictures of your sister sleeping, ok... but if you have 20 or 200 nothing changes, and you don´t improve your sneaking because you manage to take the picture, if the developer wants to put all this stats in the game, they should use it better.
Considering all this, the game looks amazing, the best i see, just hope the gameplay will improve later.