How does Flexi Dining work?

We have cruised a lot with other cruise lines but are thinking about trying MSC. We like the Anytime Dining on RCL and Celebrity, is MSC's Flexi Dining similar? Can you just show up and they seat you as tables are available or do you need a reservation? Is it possible to get a table for two or do you need to dine with others?

Thanks

The only bookings that have 'open' dining are Aurea (MyChoice) and Yacht Club (in the Yacht Club dedicated restaurant). It is possible to just turn up, but you can only be accommodated on that basis according to availability. You certainly have more chance of getting a table for 2 by making a reservation (though there's virtually no problem on that score in YC as they have a lot of 2-tops).