Share your experience!
Last saterday I got the message that version 5.0.2 was ready to be installed.
I used Sony PC Companion, followed exactly what was listed on the screen and started the upgrade.
Within 30 minutes I had a proper working Android version 5.0.2 with all the personal settings intact.
Now, some days later, I haven't noticed anything which is not ok.
Perfect job Sony !! 
The wording is confusing?
Between all the negative posts about Sony I wanted to tell the opposite.
The upgrade is done as described and went 99,999% OK.
So it is not all drama !! 