Episodes 2 through 4 were added yesterday.
Watched episode 2 and half of 3 last night before going to bed. They are following the books as perfect as I can remember. The nice thing about this is there is a solid story and we aren't being subjected to the directors whims and monster of the week episodes as we are in normal sci fi. Of course one could have said that about Game of Thrones as well, and from what I hear it went off the rails a bit in the adaptation.