I updated in the early years. ie: from 6.3 to 7 through the 8 series etc. Since version 9 upwards I have done clean installs this is why I was asking about updating 10.3 to 11 or do another clean install of 11.
Did update 9.3 -> 10.2 -> 11.0 without major problems, just remember to backup any customised configuration files and your data. Take paper based notes of partition and mount information, backup again -) Make at least two distinct backups (more if you have the time), it is not good news to find that the one and only backup is trash.... (this goes for clean reinstall as well as backup).
If possible do a test run on a spare machine... make certain you have a good idea of how to get back to your start position if everything goes terribly wrong.
So far never had to use the results of this preparation but the first time you dont do it will probably be the time you wish you had :-)
-- Clive. http://homepage.ntlworld.com/c.rogers/ Fighting for darker skies. From 52:26ºN 01:27ºW (Coventry, UK) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org