I played both chapters and OMG THEY ARE AMAZING. Characters well written, very complicated misterie and the trials are just as good.
The only problems that I have with it is that sometimes it stops and I can only restart from last save and that some conversations are not that interesting and you must do them to continue the story.
I loved LoD and even with just two chapters SG is better than LoD, so I can only wait for the rest of the game.