Ladies Marine Automatic Chrono

I am considering buying this watch for my wife for a special occasion, she tried one on recently and we both love it. I don't have a picture but the ref is 8491BB/52/964, I believe the movement is a 550.

Before I buy it I would love to get the opinion of others on this forum, what do you think ? What about the movement ? I have read some criticism in the past about the Marine range so would very much appreciate some expert opinions on this before I embark on a purchase.

The only think I don't like about it is that it's an automatic and yet you can't see the movement due to the solid caseback, do others share this view ?

Many thanks for your opinions,

Anthony