Heck, I even have a spare cloned 2.5" HD ready to install if the OEM one fails. So, yes, I think it is still worthy.
I think you would make a lot of people happy, me included, if you explained what the steps are to clone the Z's HD. I have two HDs ready for that process, I know it is about copying an HD image but which tools did you use etc would be informative. This may not be the place to do it but there is a file section on the Wide Inkjet Printers list that could archive your description.http://groups.yahoo.com/group/Wide_Inkjet_Printers/
I'll second that! Have you actually tested the procedure?