Well I saw it last Tuesday. It had been moved from one of the smaller screens (number 7 originally) to Screen 2. And there was not a spare seat anywhere.
There was a mix of ages, but noticeably more older men than you normally see at the cinema, and what looked like older dads with their middle-aged sons I think.
The showing included the original Overture at the beginning and an Intermission, there was even one of the staff selling snacks from a small trolly during that. Never seen that in the cinema, but then I have only ever seen one other film with an intermission (third Lord of the Rings film).
The film was stunning on a big screen. The Discovery looked amazing in 'full size'
And the trip at the end was even more spectacular.
Really glad I got to see this, there were only 2 showings within reasonable distance (although at 2 different cinemas at the same time, so 4 shwoings in total). The opportunity not wasted and was greatly enjoyed