How Safe is Upgrade option.

My boxed Suse 7.3pro just walked in the door, and I am contemplating fireing up yast and doing the Update Existing installation routine to replace the 7.1 install currently on the machine. Since I have not done this with Suse before, I'm a little worried. Yes I'll take a backup, but what I really want to know from Suse Sourdoughs (Alaskan for Veterans), is wether this is a good idea or does it munge things more often than not? (Another of the never ending data SECURITY questions). -- __________________________________________ J.Andersen.