If I'd tried to follow on TV as broadcast, I would have dropped out by the 2nd episode, as things were already getting ridiculous....but with DVD sets, it is all too tempting to just keep going. "I'll watch only ONE MORE episode..."
Anyways: after finishing this, I felt exploited. The storyline is full of inconsistencies, and feels like something that was just made up on the spot by desperate screenwriters, trying to come up with something "shocking" or "MORE shocking" in every episode. There is not internal logic to it -- by the end, more than half of the characters are killers, serial killers or accomplices of a serial killer. The ending is especially annoying, as it is not deserved and gauzy (everyone not outright killed, is now happy and has a cute baby!). Also, the show drops a lot of "fact bombs" by the end -- things we were deliberately deceived about.
The really interesting ideas touched on -- can a child of 9 be a budding monster and future serial killer? can the tendency to be a murderer be inherited (especially if your mom, both your grandfathers, your grandmother and a few aunts/uncles are killers!)??? But this is all dumped, in favor of addle-brained plot developments, and ridiculous scenarios, and people who just don't act like real human beings.
It's all set in a monstrously lavish house, decorated like a showcase home -- in the first episode, a canny PR person can't even find a room in the home to shoot an interview, because it is so lavish as to be off-putting to voters -- I don't know if this was a real house or a set, but it is claustrophobic and only serves to make the very rich family at the center of the plot unsympathetic yuppies.
It helps not at all that one major character (yup, a murderer!) is running for mayor of BOSTON -- hardly a small town -- but spends all her time trying to track down various serial killers of her family & others, so that she spends close to zero time on her campaign (yet wins!) -- while having a lesbian affair with her black campaign manager -- how many trendy PC points do you get for THAT? Her father AND mother were killed by serial killers (but not before her father is NAMED wrongly as a serial killer for most of the episodes!) and this doesn't hurt her campaign, nor that her one brothers is a crackhead junkie and her other brother ALSO is a murderer (but don't worry, she got him off without jail time!).
If all that is not bad enough to deter you....this vastly rich, powerful political family in BOSTON lack any Boston accents whatsoever. The Kennedy's all had Boston accents, so how could they ALL grow up in Boston and yet sound like they came from Columbus, Ohio? (The only character with a genuine accent is the female police officer, which only serves to make it more glaring for the others.)
Oh, and NOBODY for 12 episodes has a problem with the chief police investigator on a huge serial murder case, with bodies all around piling up....is the BROTHER in law of the suspects (oh yeah and black, while they are all white) and NOBODY has a problem with this. (In real life, his presence would make prosecution impossible, so he'd be tossed off the case instantly.)
Those are only the highlights of a very bad viewing experience. It makes you feel totally ripped off for having sat through it. So many of these long series -- 12 episodes or MORE, some running for YEARS -- tell stories that could easily and BETTER be told in ONE two hour movie -- or at most, a 3 episode "mini series". What ever happened to mini-series? today, a silly murder mystery requires as much time to unfold its story, as "War & Peace" or GWTW! and that is just absurd, and almost punitive towards viewers. It needs to stop!
In conclusion: not recommended.