Personaly I find a lot less log on problems than h-mail. You still can only send 10megs at a time, but can store 1gig instead of h-mails 250megs or what ever.
Biggest advantage by 10,000,000,000,000,000% is the g-mail website is cleaner, not like stupid fukkin hotmail with all that flashing shit and adds in every nook and cranny thay can jam one. Hotmails site is information overload, my eyes don't know where to focus.
G-mail is clean and everybit as easy to use as h-mail.