Alright, I saw the first episode and frankly, I'm a bit confused. There is way too much information squeezed into one single episode. The first one combines chapters 1 through 4 of the manga verison which is way too much information for one single episode(I haven't seen the original Japanese anime verison before). I'm just lucky to own the book verison otherwise I would have a lot of questions about what was happening in that episode.
As for the dub, it's ok to me. Sena' voice fits him nicely, he's got a bit of a wimpy tone and it works for me. Kurita's voice I'm on the fence about, it's ok but need some work. Hiruma voices is slowly getting better and starting to fit his crazy personality. Mamori's voice is nice too, done by the same person who did Sakura's voicefor theNaruto series.
Overall, I think this is an ok series, but they really got to worka lot to make it better, fix up the voices, and don't combine so much information into one single episode.