And have had only superb experience with the IWC watches with the modern reincarnations of the famous 7-day auto. At this point I have 3 modern Big Pilots and 3 modern Portugiesers and the accuracy is great accroas the board. From NIL to +2 sec a day I'd say. Just my anecdotal experience. Have not been that lucky with other modern IWC movements, outside the flagship 7-day series though - probably they pay more attention when tuning the flagship calibers...