The manga is now finished, so it's the time to make a review based on full read through and here is what I ended up with:

Story - as far as story and concept goes, I think that's the weakest aspect of this manga..
Concept of the story is pretty much a continued session of 'loops' of the exact same time period happening. Some people who maybe have just started with reading manga may find it innovating, but it really isn't, as such concept was used in numerous manga series already.
Story itself was a bit disappointing too - the story is based on the light novel, but the manga misses a few important details, which ruins the overall experience and may make the manga feel a bit rushed.

Story gets something between 7 and 8, I had much higher expectations.

Art - certainly one of the strongest aspects of the manga. I enjoyed both the style and how detailed everything was. Usually we only get detailed MC's, but in this case almost all the side characters are pretty detailed too.

Art is a strong 9.

Characters - characters sure do feel alive, the MC's personality realy changes a lot due to loop and the progress of that is well described. Side characters also get some personality, but they aren't realy developing, mostly because manga is stuck in 1 day probably.
Relations between character felt a bit rushed though and it felt like relations of side characters to the MC were improving with loops even though they don't know about it. We shouldn't forget that MC is supposed to be a green newbie in eyes of the army and higher ups probably wouldn't ever pay attention to him.

Characters get an 8.

Enjoyment - I personally found it very enjoyable and entangling, I loved the concept of looping and enjoyed the development of MC's personality. The plot also isn't complex at all for such concept, as it usually is, so it should be realy enjoyable for a casual reader.

Enjoyment is a 9

Overall I think the manga was very good (8) - it felt a bit rushed at times, but the art and some twists really kept you entangled enough to enjoy this short read.
It is interesting enough to read through, but don't expect anything complex, I judged it based on the fact it's an 17 chapter manga and for such length the plot was realised pretty well, but I originally hoped they would make it a bit longer, skipping less small details.