Firstly i find it funny that the latest reviewer - random 70778 - is critical of a historian who enjoyed the show. This reviewer makes out they know the historical inaccuracies in El Cid - while claiming that the Vikings never raided Spain in the 11th Century, when in fact Viking raids were a common occurrence in the 11th Century due to Spain being en route to Jerusalem - a route taken often by Olaf II of Norway. As for the Panteon - it was completed by Sancha after she was widowed - so it isn't as far off as this reviewer claims.
As for the program - it is good. It is more accurate, historically, than most historic dramas. It is well acted and keeps you interested throughout. It is not perfect but it is a far better offering than a lot produced lately. It reminds me of the quality and production values of Romulus.