With all of the hate towards Microsoft here i'm not really surprised of no mention of SkyDrive. It's working quite well for me. I never had any technical issues with Dropbox. I don't like their pricing model. The free account offers less space than my Gmail. The pro account offers way too much space for my use to even consider upgrading.
My other concern about Dropbox is that it took them weeks to figure out whether or not their system was compromised not long ago with the help of "outside experts." I don't know what to think of a company which hires others to figure out what's going on with their systems. That worries me a little.