This is such a classic XD it's known for its over-the-top characters and humorous take on the criminal lifestyle. Basically a parody of crime dramas. The series is characterized by its comedic tone and exaggerated character designs, typical of Go Nagai's work :D The humor often stems from the absurd situations that the family finds themselves in and their interactions with other eccentric characters. If we compare this to other stories of this genre it is pretty niche, but totally worth if you watch it with the expectations of watching a good parody :) This unknown series has left a mark on the anime landscape withoutpeople noticing, and it's remembered as one of Go Nagai's early works which not all people pays attention to. Its influence can be seen in later anime that blend action, comedy, and unconventional storytelling.
Big respect.