As Aventuras de Merlin

First of all, if you are a really big fan of the Arthurian legend, stay away from this one. Even I, with my superficial knowledge regarding those ancient stories, could tell that this show takes quite a few 'creative liberties'. This said, it is really a rather good show. The sets and costumes are nice (though way out of time for the historic era), the storyline is interesting with a good mixture of humor and suspense salted with some adequate special effects. After just three shows in the series it is hard to judge how much depth the main characters will be able to develop, but they are all so.....likable (My favorite being the young Arthur). There are probably better ways to spend your Saturday evenings, but if you're in front of the tube anyway, you can certainly pick worse.

EDIT:

I just finished watching the ninth episode. It is hard to believe, but what appeared to be another shallow if decently made series, turned into a respectable drama show. The humor from the first three shows is still there, but as the story unfolds so do the main characters, gaining depth and subtleties and opening interesting plot opportunities.

Die hard fans of the legends will still not like it, as much of the underlying mystery gets a complete work-over (and the presence of a dragon sure doesn't help there), but as a stand-alone show, it certainly got me hooked :)

If you haven't been able to see it, because you're not from the UK and have no access to internet sources: This is definitely worth waiting for!

EDIT2 (a few years later):

Five seasons and a couple of years later I can still say that it's been a good show. Even though it eventually fed off the chemistry between the main protagonists and was weakened by the sub-par acting of what was supposed to be the main villain and antagonist, it holds its own as a work of entertainment. Good quality family entertainment!

Oh Please could there be a season6 and7 because I love this serie so much Its really a wonderful serie i love all of it maybe there are some others who think the same as I do

This show is one of my all time favourites and I just love it so much. I found it during lockdown and since then I have just grown to love it more and more. It has an almost whimsical feel to it which is very refreshing from the usual, serious fantasy such as game of thrones or The Witcher. Its funny and serious at the same time which is a hard balance they pull it of perfectly.

Most of the characters have wonderful personalities and development throughout the series which makes you feel like you can really get to know them.

Whilst certain elements such as the CGI and low budget for the first part of the show, whilst noticeable, does not detract from the overall appeal and magic.

If you have not already watched Merlin, I would highly recommend it for anyone.

Oh Merlin. Four years since I finished my last re-watch and you're still breaking my heart. You are quite terrible in many ways, with some of the cheesiest special effects I've ever seen on television, and some of the cheesiest writing as well, but your story captured my imagination like no Game of Thrones has done. The friendship/romance between Merlin and Arthur is almost unbearably lovely and the characters of Guinevere and the knights still haven't left my heart. There were moments of absolute brilliance in this little family show elevated by beautiful acting that still resonate and stay with me after all these years. I would go through it all again.

Okay, I feel like you have to judge this show with a grain of salt. I've actually found it very enjoyable and oddly addictive, though that doesn't mean I think it's good. Yes, there are plot holes, character inconsistencies, cheesy dialogue, etc., but I think because it doesn't take itself too seriously (like, for example, Robin Hood was prone to do) it can get away with most of these things. There are moments of genuine comedy that I really appreciate, and the rest of the time I spend giggling at the aforementioned flaws. I think the cast is quite good as well: Colin Morgan is charmingly dorky as the title character; Anthony Head milks a surprising amount of emotion from a ridiculously poorly written character; and the rest (except perhaps for Katie McGrath, who can be a little too emotional) imbue their roles with genuine humanity. I especially like the growing relationship between Merlin and Arthur-- the way the show is written, Merlin's only reason for helping Arthur is that 'it's his destiny,' and Arthur has no real reason at all to help Merlin, and yet you definitely feel that they are starting to care for each other.

So, yeah, it's no television masterpiece, but it is fun to watch, and sometimes that's all you need.