I compared the time showing on the "dial" with that showing on a Rolex Oyster, and it was exactly the same! The world time feature is also nice.

Update: Used the watch on a visit to England that involved stops at Dallas Fort Worth and Orlando airports, and it was really useful to be able to change time zones with just a button push. However, the button is somewhat easy to push inadvertently, and can lead to moments of panic when you suddenly think that you are some hours ahead or behind the actual time, so it pays to check that it is still in your current time zone occasionally :-) .