They are rewarding and challenging.. I failed with bad players before and succeed after. I have reached stone vigil so far and it is clear you will see players sink or swim because the mechanics just about kill anybody who screws up which is nice.. If done at the proper level. I REALLY enjoyed stone vigil as it starts to force CCing on the pulls and adds pathing and interesting mechanics. The best thing to see and understand is how we are slowly being trained to look at cast bars and animations and make guesses as to what is going to happen. If you haven't notice TP/abilities at the start always showed the red circle or cone.. Now certain bosses only display cones and circles during some abilities not all. So its not always AVOID red you have to start paying attention.. I really like how they are training people to pay attention in group play.