More offline installs on my USB drive means fewer downloaded installs once I check for updates. It's always quicker to do an offline install than to download one. Before I started doing this my "best case scenario" for reinstalling Windows 7, installing all the software I install, activating and doing all the updates was about 10 hours if everything worked perfectly the first time. My maximum fee is 2 hours. That's a whole lot of bench time I'm not getting paid for, and that was only the "best case". The norm was about a day and a half. The more I can install offline, the shorter that time becomes.