This show is a pleasure to watch due to the mood, setting, and characters/actors. Steve Martin and Martin Short work great together. Highly recommend it.

So, the positives out of the way, the biggest negative for me is the formula they are using. It's essentially an intro episode then 8 episodes of leading viewers to suspect it's someone it's not, then in the last episode it's someone where there is almost nothing linking them to it in the previous 9 episodes. Season 2 was even worse in that they didn't explain at the end how the killer was connected to many of the clues and how it fully played out. You can essentially watch the first and last episode and have just as many clues linking the actual killer as someone who watches every episode.

Another issue is the Mabel character is almost always the same monotone and humorless mood/persona. Oliver (Martin Short) and Charles (Steve Martin) are great though as are most of the other regular characters on the show.