I have not read the source books (never even knew they exist), so I do not have any reference to how much the TV version deviates from it. But I found the world presentation pretty good, all the overgrown technology etc. I would welcome a bit more of the other races (Gnomes/Dwarves), but it might be too soon for that.
However, I think that the "eyes up here" scene at river in Episode 3 was a bit pointless, but probably had to be due to it being on MTV. Also, Wil in few scenes sounds like Hayden Christensen in SW prequels, which is to say, awful, but it is just few scenes, so it is bearable.
But, the special effects are pretty good or a TV show and most actors are pretty good as well.
I would give the series a chance, see how it develops.
