There's good and bad things in this series but overall its not something I would recommend.
They have great costumes, weapons, sets and some good acting but its tainted by modern French... For example half the cast especially the 'hero' have a modern french accent and the other half seems to try to have a moderate accent to sound more medieval but in the end the whole thing sound awkward, they should have decided between one or the other. Also some characters act and think like a modern person would, sometimes it felt like I was watching a lame Kaamelot with no punch, humour or enjoyable characters...To be short there's a huge lack of authenticity despite visible efforts and there's too much sometimes lame side stories in the not so good main story.
There's nothing to see here that as not been done better many times, don't waste 8h on this unless you really have nothing better to watch...It seems like lots of French movies and t.v. shows are made for a growing population of empty zombies just like American ones.