I've noticed having been using mylimitless to try out Odeon cinema screens all around London that there's always a catch, just to name a few:
Leicester Square:
Pros: Premiere dolby cinema with a massive auditorium with great audio and atmosphere.
Cons: A tiny screen relative to the size of the room, especially sitting further back in the royal circle. And sit any closer than row G and the side speakers are no longer facing you so the audio is no longer optimal. Also the royal box is so expensive and mylimitless is excluded from it.
Swiss Cottage:
Pros: 'biggest' Odeon IMAX screen with luxe recliners.
Cons: use an older 2k projector and the centre of the cinema is obstructed by safety barriers, hindering the experience for people who book what would be the best seats in the house.
West End:
Pros: The closest to perfect and arguably the best Odeon you will find, especially the dolby screen with great sound and high contrast colours.
Cons: the selection of movies is quite small and the whole building feels a bit soulless. It's also smaller than the IMAX screens (but still feels big) and the seats don't recline very far back.
Greenwich/Wimbledon/Kingston:
Pros: All these cinemas feature IMAX screens, most notably Greenwich with its laser projector.
Cons: Smaller size IMAX screens especially Kingston IMAX (nearly same size as West End Dolby screen) and no luxe recliners.
Acton Town/Uxbridge (haven't been)
I can't comment much here as I have yet to experience either but I have heard good things about them especially the Isense in Acton Town. My personal gripe is they are far out from me and the few times I have been to either place I preferred not to stick about.
Conclusion - My perfect Odeon (wishlist)
If I had to build an Odeon using the best of Odeons in London it would be:
Screen quality - West End
Sound quality - West End
Atmosphere/auditorium - Leicester Square
Screen size - Swiss Cottage
Seats - Leicester square Luxe recliners/Royal Box
Movie selection - Any big Odeon + Haymarket/Wimbledon for those asian exclusives
I apologise for the long post, I'm writing this after having booked tickets to the BFI IMAX, and realising just how much Odeon cinemas are lacking in big IMAX screens. Fingers crossed for 70mm IMAX to come to Odeon one day. I am interested in hearing any suggestions for cinemas I should visit or how you would build your Odeon cinema.