I install Winblows about once a month. So for me, it would work out great so long as I kept an fully installed and ready to go image on hand and kept my bookmarks backed up from time to time like I already do.
I have a battery back up unit which gives me 45 minutes to do what I need to do, so I'm sure I can back up what ever I need to in that time. It's only 4GB, 1 DVD.