Google browser sync

This is a great idea, though I'm not sure I like the idea of google routing through all my web history and cookies. I've installed the extension at home and work, it seems to work seemlessly despite the slower than normal firefox startup. This is of course due to the additional network activity needed to sync your browser with the Google servers. I wonder if I'll still be using it in a months time... http://www.google.com/tools/firefox/browsersync/index.html