The artwork is lackluster, as everyone can probably see. But regardless the premise itself is very interesting, and has kept me reading. Guns in a fantasy medieval period. It was something I've always wondered about, and it's here in manga form. If you can get past the lackluster artwork, then you may enjoy this manga.
But there are indeed some annoying things about the artwork. The poses that the artists makes the characters take can be off and annoying. Eru sensei (the bunny eared woman the summary talks about) has this constant head tilt that makes her seem stiff or a little off, and it's there almost every time.