I like this manga very much for several reasons:
1. The MC is not a perfect hero, he's just a very strong warrior
2. This manga get's historical armor right, gambeson, mail, proper helmets, etc.
3. This manga get's historical weapons right, albeit with incorrect sword naming. The MC uses a longsword, but they call it a greatsword. That aside, it's got a reasonable size, as with all the other weapons and shields.
4. The NSFW content feels like it's a part of the story/world rather than a story where all of the events revolve around sex,
5. MC starting as a capable dipshit and working towards becoming a hero is pretty cool.
Edit: I was wrong about the NSFW, he's only completed one great feat, but has already screwed around 20 women or so, just cuz.