Well, that's according to my memories, anyway. I was an avid Simenon reader at the time - I think I've read nearly every Maigret story - and I totally loved this series. Simenon's Maigret stories are very difficult for directors and actors to adequately capture because he builds up an atmosphere using all the senses, not just the visual and aural. He also develops the atmosphere gradually - Maigret's or someone else' health, the drinks and food he consumes, Maigret's ponderings on the crime or the criminal, the weather. That atmosphere is also tied in with the specific psychological aspects of each case - Simenon was fairly obsessed with exploring the psychodynamics of pathological behaviour, and very much in the style of psychoanalytic descriptions and explanations. I don't recall seeing any other adaptation of the Maigret novels that came as close as this series. I wish it were available.
