I have not finished the whole game, but I played enough of it to get the picture of how it will play out from where I am quitting.
This game is a huge wasted potential. I've never felt so bad playing a game because it could be SO much better if they just polished it a bit more. The game is divided into 2 parts. The first run is a mandatory "evil" route for story purposes. The second run which is basically a NG+ is a mandatory "good" route. This approach itself is rather terrible in my opinion. The 2 parts use different mechanics. Evil route uses the monster forms and good route uses a "doll" form with human party. Both routes have separated story chapter progression from the general exploration which was another weird decision imo.
I'll touch upon the evil run first. At first, the monster system seems kinda cool. But you quickly realize that it's extremely limited and doesn't really offer much. The monsters differ in stat gains and their 2 skills, but it's not interesting enough nor varied enough to keep your interest past the first hour of playtime or so. You have a equipment crafter in your camp from the start, but it never comes into play for this route. Some humanoid monsters say they are good with equipment, but they can't equip anything. Turns out equipment only becomes available in the second run. There is battle sex, but it's repetitive and not fappable (no proper dialogue and you gotta spam buttons).
So after you "beat" the game on the evil route, you restart and are forced to be a good boy. The heroines you raped in the first run become your party members. I quit around chapter 2 of this route because it was so boring. You carry over items, equip, and gold from the first run. You can buy OP stuff from the town right away. You can carry carry over the strongest weapon from the previous run if you bought it with Karma points.
They have some of the groundwork for a great gameplay eroge (changing forms, crafting, gathering, etc etc), but every aspect of the gameplay falls short. The end result is just something that leaves you with disappointment at what could have been.
If the H content was any good, the game could have been salvaged at least. But the H is also a huge wasted potential. The artwork is absolutely top notch. This artist is amazing (I feel like I've read his works on hentai sites). Plus, it's animated quite well. However, the game is pretty much devoid of any eroticism. There is no such thing as build up, corruption, proper H story arcs. Battle sex lacks dialogue. Story sex has some dialogue but the context of the scene just doesn't do much.
So finally, is the actual plot any good? No, not really. It's basically "you are stuck in a MMO. What do you do?" It was quite bland. Granted, I quit before the main romances and stuff starts on the 2nd route, but it is the game's job to get me invested in the story and it failed to do that on the first route.
The translation was fine though. It's a great fan translation. I didn't find many things wrong with it.