The London Eye ride had a duration of 45 minutes a...

The London Eye ride had a duration of 45 minutes approx. I would suggest to but the tickets in advance and as a combo with other attractions, so you will save some money, otherwise it's not worth the price of the single ticket.
The view from up there is really beautiful, it's something good to try for example the first day in the town, just to admire London from a high point.
The cabin is quite big, at least 10 people can stay there and still you have lots of space to take pics and enjoy your time.
I would recommend it!