Depends on your use case. If you want to share documents and you don't mind google's version of the word/excel/ppt, it's a good way to go. For files in which the application is on your laptop or has complicated directory structures, dropbox is better. Google has cheaper storage -- 20Gb for $5/yr last time I checked. I think Dropbox is something like $10/month for 50Gb. Google Docs is good for simple documents, but the rest of the apps are pretty bad compared to MS Office. If you're a powerpoint ranger, you aren't going to want to use Google Apps, you're going to want to put your PPT files in dropbox and use Office.