I finished it. Bugs, glitches, faulty audiomixing and awkward camera angles abound, but more importantly: there's almost no unskippable content, so be prepared to sit through minutes and minutes of dialogue or cutscenes whenever something goes wrong or doesn't work as it should (which it will, oh it will), as well as stumble around with awkward fish tank controls. The production values are far lower than for a Telltale game, for example when it comes to the gameplay and cutscenes. This is especially evident with the graphics as noted above, which are really bland, and with the voice acting. With the latter, however, it's good enough in the sense that it is amateurs doing their absolute best under poor direction rather than good talent phoning it in. I prefer the former (it has kind of a Bloodlines-vibe to it). You'll often struggle to make the game do what you want it to do and have to work through what is a relatively huge amount of tedious work to progress for a genre (that is, a genre that should require no amount of tedium at all). Just like
Rahdulan said the game works best when it locks you into on rails dialogue scenes where characters and writing can shine and your brain is kept active with how to navigate the choices (which often do a really good job at making you weigh the advantages of the different selections) while it is at its worst in adventure game like fish tank scenes where you have to click enough interactables.
If all that sounds fair to you for the chance to experience a good (not great) story with some highlight moments and very charming characters, some of whom you'll remember fondly for a bit, well then you should play it. Otherwise, skip it.
Regardless, play The Wolf Among Us first if you still haven't. Its story's high points are as good as Blacksad's, and while it has more low points, it has none of the issues above.
For those interested in the amount of C&C, there's a little more than in a typical Telltale game, but not a lot. Some of it dramatically changes outcomes - like characters dying - but the choices that lead you there are often incredibly minor. For example, I saved a character by lifting her spirits just a bit in one scene, while I got another killed with a fairly insignificant dialogue choice early on. Just like a Telltale game, there are a multitude of false or at least cosmetic choices that don't have a clear enough payoff, which is a shame, because they're quite well-designed choices which could have paid off without creating splitting branches or similar design headaches. There are also plenty of choices that are directly false leads, which are more inexcusable, such as the game leading you to believe that how you treat certain characters will lead to different arcs with them, but in the end these arcs are simply not possible within the scope of the game. For instance, you can flirt quite a bit with the female lead in pretty subtle, mostly non-cringey ways, but that's all window dressing and isolated to those specific dialogue choices - it changes nothing.
