I have had my wee Now TV box and Entertainment subscription for two months now and I’m pleased to report it has been pretty much faultless for watching Game of Thrones season five, albeit through the Catch Up service rather than live viewing on the Sky Atlantic channel. Not a single instance of picture break up and the 720p picture quality has been extremely good. The Sky Atlantic fan show Thronecast has proven a hit with my family, too, but we’ve found little else on the channel (or ITV Encore, the other Sky exclusive, come to that) that justify keeping the Entertainment sub running after GoT has finished in a few weeks. I will cancel it in June (unless he reviews for the second season of True Detective suggest it's as good as the first).
One blip was with the final episodes of Mad Men when there has been a notable drop in PQ for a few minutes on a couple of occasions during episodes. But again, no break-ups to report and the service has been solid.