TL; DR - Genuine 3D animation and lots of great poses and scenes, but the models don't look all that good and the gameplay is a long and complicated grind, maybe the worst I've played in that respect.
Pros:
1. Genuine 3D Animation -- Starting from a one star, this goes up to two stars for genuine 3D animation. This means that when a sex scene is happening, you can change the angle around however you want to. In some scenes, you can even move the camera around for extra control in getting just the angle you want. Some views can get blocked by furniture/walls and such, but of course there have to be limits. It's hard to overstate how awesome it is to have genuine 3D animated scenes, instead of just 2D made to look like 3D as one finds in most games/AVNs.
2. Number of scenes and variety of poses -- The two stars goes to three stars because the game has an insanely large amount of sex scenes with a variety of poses. This is a definite big plus about the game. As long as you keep playing and exploring, you're likely to find the pose you were looking for. Combined with the ability to change the angle however you want, this really gives the feeling of getting whatever pose and angle one wants from this game. It's pretty great.
Cons:
1. The models -- Starting from five stars, it goes down to four stars because the models themselves do not look all that great. It probably shouldn't be too surprising, because genuine 3D animation is bound to require a lot of processing. If the models were more detailed and rendered with higher quality, it could make the game unplayable for a lot of players, if not most players, due to hardware limitations. So it's easy to understand the decision of the dev for lower quality models. But, this does mean the bodies aren't well detailed, and the faces in particular are not very enjoyable to look at. If you play for awhile, you might get used to it and see what the dev was going for. Personally, I was able to move past this, but it is obviously a definite minus.
2. Gameplay -- Going from four stars, it goes down to three stars because of the gameplay. Basically, its a huge grind. But its not just a grind, it's a very complicated grind, and so the game can get very frustrating. I found myself stuck at one point after getting far into the game, and couldn't get further, not because there was nothing left to try, but because there were so many things left to try that were no longer the obvious things to try, and no hint to figure out what was needed. Combined with the long loading times between rooms/locations, the game becomes hard work rather than an enjoyable experience. Some ppl like their games to be a challenge, but honestly it doesn't feel like a challenge when its just about trying every conceivable combination until you hit upon the right one, and there's hundreds of combinations to try. Additionally, after reading the walkthrough, I came to realize I missed some scenes, some of which I couldn't go back and see. It seems like if someone followed the game update by update, it would have been fine, but for someone jumping in new into the latest version, the game can end up a confusing mess.
Then there are weird bugs, like if you save, do something, then quit and come back, sometimes the game still registers that you did the action that you did AFTER the save point from which you just loaded. Weird.
Summary:
This game is solidly in the three star range. The genuine 3D alone should be enough to put it higher, but the horrific grind really counters it, which without the genuine 3D would make this game a one star. I wouldn't suggest this game if you are just getting into adult games here. But if you've been around for awhile and are looking for something a little different, you could give this a shot, Just do yourself a favor and don't try to play it without the walkthrough. It's not worth trying. Also be prepared to put some time into it. While there is no gallery, most scenes, of which there are so many, are replayable; so once you get through it, it will be nice to revisit. Just got to get through the grind.