It's Google, so of course some people are going to be immediately supportive or dismissive of Google Drive. I spent a decade with Yahoo and moved last year, and so far I've been impressed. Google Drive is pretty spiffy, so far. As I play with it I'm sure I will find bugs and quirks, but it works just like intended, and my Google documents were waiting for me when I logged in. It works beautifully between my Windows desktop, Linux laptop and Android phone. I can view my writing, move songs or whatever else I like between devices, and always have my most updated copy.
There are a few problems, but nothing new. The scheme is obnoxious and the color combinations can be unfriendly. If you are going to insist on a snow white background, high yellow never practically comes into play. The lack of customization is the same across all Google products (except Gmail, bless its digital little heart for having a night scheme). Google Drive has all the goodness you've come to expect, the same issues overall, but no new aggravations, earning it a B+ in my book. Give me customization in how it appears and we're talking a solid A. I have written one more "WTF, why can't we have THEMES" review in their request for feedback, so maybe someday they will listen to all of us and implement color choices. Until then, I have no complaints about the performance or glitches in quality for my documents. For a writer, that's a big deal, and it beats any sharing system I've used, including Ubuntu One.
Google's integration makes them the leader. I'm not personally biased and am in fact normally suspicious of the giants. But if you just look at them in terms of what works, they have them all beat. The moved into the business market, with more small and medium businesses using Google Docs and Gmail services, and now they will be instrumental into weaning the public away from Microsoft Office. Once they improve account linking and GIVE THE PEOPLE SOME DAMNED VISUAL OPTIONS they will be the go-to for online storage and activity.