There is much more drama here, much deeper character development and, of course, the whole story has a whole new depth than that of its predecessor 'House of Cards', which everyone seems to prefer. That was mostly humorous, very light entertainment.
I found this one far more rewarding due to the above. Gone was the inevitability and lack of challenge of 'H.O.C.'. Here the main character has to plum to real depths to achieve his aims.
Onto the gripes: Primarily, the pacing is a real problem. It struck me that the first three episodes were little more than exposition, establishing the situations of the story, a three-hour Act One. Nothing really happens, story-wise, until the final episode.
The presentation of the homeless was at times a little trite, although it was amusing to confirm my suspicions about Emma Bunton's acting skills.
I did not find the ending forced at all. In fact, the means are far more convincing and difficult to pull off than any of the maneuverings of 'H.O.C.'
What carries this serial through really is the relationship between Urquhart and Harding. Although clearly an echo of that of with Storrin in 'H.O.C', it does not seem out of place; here is something with strange, emotional, dark and disturbing undertones.