Funny you should post about this. I just finished reading the article about them over at TGN and came here to find your post.
Does look promising, although I do wonder how the mini's, especially the horses measure up. Personally I already have a ton of GW's Bretonians, so don't have a need for these, which leaves me a bit disappointed by their choice.
I can understand how tough it is to take a chance on an untried product, but I am disappointed that so many companies, including Mantic, aren't looking beyond the already established GW human armies and going for something a bit different, like the Arabian theme, or pseudo Asian, or a truly barbarian horde style.