I really like this series. I think the writing is very good, the plot so far has been excellent and the acting is good. Yes there are flaws, like I said, and that really centres around the accent of Dominic Monaghan as Tommy Conley. It really is a very bad American accent. I am not sure why he couldn't have just been British - would it have really made a difference and it would have been so less painful. I have to say, however, that the acting and plot has been so good that I have not been hung up on his accent as much as I thought I would have been when I watched the first episode.
The murders are original and you feel for the actors. This is not a who-done-it series (although they keep you guessing as to who the mastermind LH is). You know who's done it straight away but the plot is interesting, fast paced and does keep you guessing.
I like Michael Nyqvist as Mikael Eklund. His acting is excellent as always. The other characters are good, although the daughter clearly needs the sense knocking into her.
I enjoy the mix of English and Swedish and the drab setting of Sweden (not that Sweden is drab, but they portray it that way) makes it more believable.
This is not a shocking series but is generally a very good watch and I recommend it to everyone, especially those that like the Bridge / the Tunnel, Wallander and the like.