I found this absorbing and entertaining, the piece suited a Saturday evening with the chance for a drink afterwards.
While it isn't the same as being in the main auditorium, you actually are part of an extended audience in the cinema. Mostly retired to go by appearances, and regulars at these shows too, going by the myriad sandwich boxes which appeared in the interval (also a way to save money on the usually overpriced food at cinemas).
A few attempts at applause to join in with the New York Met audience, this is the one thing that doesn't quite work in the cinema, but you can sense the involvement all the same, not least at the couple of (very brief) points when the satellite transmission failed to a Mexican wave of sighs from the crowd!
£15 isn't cheap for a cinema ticket, but next to $200 for the Met itself it is, as they say, a bargain. £12.50 concessions.
Well worth it.