Black Cat is a bit of a ridiculous story. At times it feels like it could or should end but instead becomes more complex and cotinues. Some of the characters go through some rather impacting changes. The show looks okay. Battles don't usually last very long but are still enjoyable. The characters in this show have a lot of potential. One character specifically changes dramatically. Personally, I think Sven has an aura about him that is hard to beat.
Overall, this show is pretty solid. It may mix things up in a negative way but at least it goes all out in the process. This show is pretty episodic however there are a few arcs that shift what is going on in a big way. Some of the characters are pretty memorable. If you want a good action hero drama this is probably what you should consider.