Today the Windows Phone 8.1 update finally arrived for my Samsung Ativ S GT-i8750. It was first updated to Windows Phone version 8.0.10532.166, then Windows Phone version 8.10.14157.200 was downloaded and installed.
In the process the Bootloader was updated from version 13.08.14.16 to 14.09.3.16. The radio software was updated from Version 2418.104.22.168 to 2422.214.171.124.
So far I’ve had no issues with the updated. I know that there has been some issues with the camera and the flash in the developer preview but this seems to be fixed in this version.