I couldn't get past episode 4. Forced myself to get that far to give it a fair enough shake. The Holy Grail mystery is the most interesting part, but it always seemed to be getting over shadowed by other plots. Loved the sets and the actors did well though. Costumes were cool too.
Oh also that part where some guys arms is chopped off, mail and all. Yeah, that annoyed me a lot. (I still pushed through to the end of episode 4, but that was the last straw for me).
Whether you enjoy it or not is up to you. I can usually forgive TV for not being 'accurate' so that wasn't the issue I had with it. I just wanted more stuff with the Templar's, not the Queen.