Pretty brutal isekai. Though there are no graphic depictions of grotesque scenes, there is no shortage of fights to the death or death itself. The amount of these battles is also high (too much for my taste) and all books are told in the first person. Can be tiring to read non-stop combat chapters back to back. It gets a bit better in 3-4,5-6 volumes, as MC have more opportunities to fool around and get involved in some political problems, but still this isekai remains to have main focus on action scenes. There is little (almost none) focus on MC's past life, this is mostlya "monster" focused story with minimal mingling with humans. He does not build a monster nation or anything like that, just basic survival and some application of human knowledge to make his own daily life easier. The monsters he actually interacts with are quite human-like, so there is a very thin line between intelligent monster and human.

MC has few needs (only social, to have someone to talk to), which leaves him with a lack of obvious motivation to do anything and often leaves the story to progress artificially by some deliberate push from the author. This is the biggest problem, which is especially evident in the beginning of the 4th ark (volume 7). It feels too artificial and shoehorned in, basically degrading to volume 1-2 levels. Battles happen as if the author is filling some quota without regard to the story. Seeming inability or unwillingness to write political intrigue, no direct conversations within the MC party (only a few bonus chapters do this outside the scope of the story).

There are also some inconsistencies in the magic system - after the 3rd volume it starts to change a bit, and by the 7th volume it feels like the author has completely forgotten how the skills were learned before. There's also a change in the frequency of MC using his skill to view enemy stats and get detailed info on enemy specific skills (which is kind of a big deal) to strategize the fight. At some point you can see this as an overconfident lapse, but it becomes apparent that this is not the reason and more likely just a convenient way to play out the element of surprise.

That said, the story is entertaining enough to read and enjoy. If I were to give my overall rating for each volume:
1,2 - 7 (overdose of battles, quite tiring)
3 - 8 (improvement from 1,2)
4,5,6 - 9 (best stuff here)
7 - 7 (feels like 1,2. Plus somehow, out of nowhere, MC starts caring about his past life?)