I haven't really shared my thoughts on the actual episode yet, but I really liked it and think it is by far the best - by several orders of magnitude - of the two Weeping Angel stories I've seen (I'm in a distinct minority in that I don't find Blink to be the masterpiece that most other Whovians do).
It also solidified my conviction that the scene in Once, Upon Time of Bel sitting by a campfire and Vinder talking to her via holo was in the past while the rest of the scenes with her were in the post-Flux present because, in this episode, we saw the limitations of the holo-tech that Vinder was using to talk to her in the campfire scene when she used it to try and tell Vinder where she was headed.
It also solidified my conviction that the scene in Once, Upon Time of Bel sitting by a campfire and Vinder talking to her via holo was in the past while the rest of the scenes with her were in the post-Flux present because, in this episode, we saw the limitations of the holo-tech that Vinder was using to talk to her in the campfire scene when she used it to try and tell Vinder where she was headed.