I can certainly vouch for this!
I have a '97 528iSE Auto, despite the many issues that are known, I have an example that's been flawless for all of its life - and the high side of 270kmiles!
Whilst its not a cheap car to run by any stretch of the imagination, its build quality defys belief, despite its age & miles, mine - the autobox as well as the car in general- is still smooth & responsive to change up, in "D" "S" or "M" modes.
I've probably tempted fate & will soon experience catastrophic gearbox failure

, until then, I will wave the flag for a superb gearbox!
Edit: whilst I hanker for an e38 740i, I can see a 530i being top of the list to otherwise replace this, which from an ardent e38 fan, says it all about my overall view of the e39 6's.