Ahh, I see what you mean - I just went through the Logitech website and read more about it.
I personally just use the on-board memory and config each game to match the one profile, probably because I switch between several PCs and can't install the software on the work ones.
Pretty cool, eh!
Incidentally, this page seems to have lots of useful info, so might be useful to any other G700S users in future: http://logitech-en-emea.custhelp.com...ail/a_id/41585