So glad the season had started and people can stop complaining about only being able to see the trailer.
For future reference, anytime you buy a show before it has aired, you won't be able to watch it right away. The primary reason I purchase full seasons on Amazon is to be able to watch at my convenience, commercial free.
That said, episode 1 was really good. I don't want to spoil it for anyone that hasn't seen it, but it definitely is setting a very serious, tense, dark tone.