Yes, the result is only available in English and in my circle of friends, there were some people who had problems understanding some scenes. The German version is likely to emerge after the 27.04 (German First aired on Sky) on Amazon.
The first episode was very good quality and sound. The HD quality is perfect and looks very nice on the TV from.
Even with my not-so-great internet connection has the consequence load quickly and after a few seconds the image of very blurry jumped on crystal clear and was gorgeous for the rest of the episode.
GOT As 5 Ep 1, the show in my opinion begins, very good. One is reminded of some events of last season and the end raises some questions. Like every year, are probably the first 3-5 episodes building be and then everything will end in chaos.
Looking forward to the next episode ...