It was ok, I guess. The world itself is pretty interesting and I like survival stories, but the book somehow just didn't hold my attention. It didn't help that there were parts I found weird, and other parts I just simply hated.
Good:
-Good old Don't Starve/Subnautica/Robinson Crusoe/Mysterious Island style survival,
-magical runes causing magical magic effects,
-awesome otter lady
Extremely weird:
-Uncomfortable amount of talk of excretions. The book starts by MC thinking about bowel movements, then the first real fight is caused by a dragon shitting next to MC, then he goes looking for deer pellets, then his system describes cores as soul shit, then he randomly sees a monster with the skill "flatulence", etc. There were at least 3 other instances, but my brain (thankfully) already ereased the corresponding memories. Somehow everything revolved around shitting.
Bad:
-The snarky(?) system is aweful. It sounds like what happens, when a person never had fun in their lives, didn't encounter a joke during their lifetime, and only knows about the concept of laughing because some acquantance of theirs tried explaining it to them. Now imagine that person trying to write something funny, and you get the system. It's just random references to things, then MC laughing at the unfunny thing the system said, or maybe saying "Thanks system, I appreciate the reference". It's jarring as hell.
-The MC is just bland. So is everything else. I don't know if it's the writing style or something else, but everything felt muted somehow. This can be a positive, at times it contributed to a feeling of meditative peace, but most of the time it just made me focus on the book less.
I probably won't continue with the series. It's not bad, but I didn't find it good either. It was a strong OK. Hope your experience will be better.