I think you've got to see this video really:

http://www.youtube.com/watch?v=rOtEQB-9tvk&feature=relat...

I think gmail is a fabulous product (imagine emails before gmail) and like every other agile product, it has its problems. The fact that we don't have to spend "any" money for storing gigs of our data on a secure and safe platform is probably enough for me to use it.