So I watched the first episode (or half the pilot or whatever...it was 50 minutes long and ended on a cliffhanger) the verdict so far: INCONCLUSIVE.
The script wasn't anything amazing. It moved along at a good pace (MAYBE TOO FAST) but nothing about it really grabbed me. Worringly despite it having a bit of swearing nudity to make it "adult" it wans't really anymore sophisticated than a typical Merlin script. Still, it was only the first episode and things could develop and get more complex with time.
Not sure about the guy playing Arthur. He kind of felt a lot like the BBC's Merlin character as he's the young guy arriving at Camelot for the first time and being thrust into things. Really the Arthur from Merlin seems more believable as a future king. But again there's room for him to grow and develop...
I kind of like Joseph Fiennes as Merlin. His aboslutely mental grin is more suited to this part than it was to top FBI agent MARK BENFORD. Kind of interesting that he won't use magic after helping Uther rape the Queen. Hope he gets LOADED OKAY at some point.
Evil King was quite a good evil king.
But the star of the show as blantantly Eva Green as Morgan, who was far ahead of everyone else in terms of acting and, well, being really sexy. I like Katie McGrath but she can't compare to Eva who managed to completely outdo her in the evil smirk stakes in just her first few minutes of screentime and did a far better job of coming across as a more complex, somewhat comflicted villain with one line ("I'm sorry.") than Merlin's Morgana did all last series.
SO YEAH it wasn't a hit right from the start but it wasn't horrible and there's potential and Eva Green so I'll of course keep watching.