This is obvious question. Any software/system which is Good, should make a person more productive, should save time/energy/money!
I just read a blog post on Angus' blog (who is Sr. Product Manager at Microsoft) about this, take a look..
http://blogs.msdn.com/angus_logan/archive/2008/05/03/get-more-productivity-out-of-live-mesh-with-vista-tips-tricks.aspx
Live mesh really rocks!!
Stay tuned.. 