tl;dr - While not without it's flaws, this is an extremely fun sex romp with enough twists and turns to keep things interesting.
So, the story begins with the usual ridiculous premise: the MC is the lone man dropped in a community of 40+ women and has been tasked with having sex with all of them. The first challenge this presents is trying to make such a large cast of characters distinct; making that many characters to have them be cookie cutter copies of each other is just bad writing. Fortunately, our authors mostly succeed at differentiating them. Occasionally they do become a little tropey (Courtney and Brittany come to mind here) or lean a little to hard on their shtick (Alice and her narration) but they do manage to stand out.
Reading other reviews, the character of the MC seems to be divisive. For my part, I think the character works well as a reluctant stud who tries to be considerate of others and wrestles with the ethical implications of his actions. I can certainly understand why other people would find him insufficiently assertive, but I'd chalk that up to differing understandings of both masculinity and what the story is supposed to be about.
As for sex & fetish content, there's nothing very outre here, which I think is part of the charm. The massive boobs are certainly not going to be to everyone's taste, and there's scifi bullshit magic to explain why the MC's 2 foot long dick is able to fit in women, and to be fair, it does get scaled back later, though it's still improbably large. The sex is fairly vanilla, though later on there's some incest (and more promised/threatened) but that's probably inevitable in The Year Of Our Lord 2024 (thanks Game of Thrones) and tonally it ranges from very loving and sweet to very harsh (thought still consentual) "take it slut" pounding. There's also a fair bit of content involving women in stockings, which is proof that the authors have patrician taste and large penises with which they have assuredly delighted many women. (Hint hint authors if you're reading this)
I do have a few critiques of the VN. As others have noted, there are a fair number of spelling/grammar mistakes. Not fatal, but frequent enough to be noticeable. Another notable issue is that, at least on the screens I've used, the images are too dark - there are several very dark-skinned women the MC has sex with who are a real struggle to see during their scenes. Again, not fatal, but annoying - these women have obviously been lovingly crafted by the authors, so it's a shame we can't enjoy them! Finally, the biggest critique is the ever-escalating scale of MC badassery, which is a problem with a lot of works in the genre. The MC goes from a guy out of his depth trying to do the right thing to a being of incredible power over the span of a couple weeks. This creates an odd dissonance where the MC goes from facing down some of the most dangerous beings in the galaxy to having a round of beach volleyball that really challenges him. It's very... odd. I wouldn't say it's bad, exactly - the heart of the game is the main character's evolving relationships with women and it's good and important to lot lose sight of that - but I sometimes find myself wishing he'd spend a bit less time involved in galactic do-goodery and more time with the women.