Ok, so I've read up to ch. 133. This review will be based on that progress. I'm no professional reviewer or anything, just jotting down my own 2-cents is all I'm doing. Hope it helps.
Writing Quality: 4/5 - There are a few instances, and I mean very few instances, where I have to re-read a section due to incorrect spelling or grammar or something else like that. Very good in this aspect but not perfect.
Stability of Updates: 4/5 - Updates are pretty consistent at one chapter every 1-3 days. It's just that the chapter lengths are abysmally short, so yes, I'm docking a point due to short chapters.
Story Development: 4/5 - Story revolves around Aoto (the MC) running his shop and the struggles wherein that occupation deals with. Simple, yes, but not super engaging just on it's own. Even with some Ninja elements thrown in often enough, it just feels like the story .... drags or just gets boring at times. Admittedly this issue is only shortly lived I feel it's still something that needs to be acknowledged.
Character Design: 4/5 - I like Aoto as a character. His objectives are pretty clear. He understands his own limitations and wants to overcome them in his way in regards to the normal Ninja way. I also like the way the side characters are implemented as well, kinda different to how other novels do it. Other Ninja world specific characters do feel true to their character for the most part, as do the added side characters (though sometimes they seem to be leaning more towards a caricature than a true representation, we'll have to see if this gets corrected or not down the line).
World Background: 5/5 - Not the biggest Naruto fan so I can't say if things happening in the background are exactly as they should've happened, but I feel like things are fine.
Overall: Should you spend your time reading this novel? If you're looking for something action packed, then no, skip this. If you're willing to 'let the author cook', then sure, enjoy the read. Also, incase anyone is wondering, so far there is no romance or anything like that .... at least not yet, not sure if there will be in the future.