I finally got round to watching this and I quite liked it. It certainly has potential and I'm interested to see where they go with it. I didn't think it was amazing though. I wouldn't lose any sleep not knowing what happened if I missed an episode, whereas with some shows I panic if I miss one and try desperately to find somewhere to watch it. (Which is how I ended up here in the first place funnily enough!)
Maybe that will change as Merlin progresses but if not, it's still well worth a watch.