Overall, this is
extremely popular in the chinese lightnovel community (along with the others Kira mentioned). I would say it's pretty good work.
And btw, Kira, I didn't read volume 6 in detail yet, but did
Spoiler for spoiler of the end:
Listance really die in the end
? The way she just disappeared in the end... is so depressing. When I saw the cover, I thought that Listance was returning and our MC would duel wield the legendary holy and maou swords.