(Disclaimer: this is a referral link that will give us 5gb https://copy.com?r=b2yUAQ ;-))
Let's not forget they have a working Linux client. Maybe things have changed since I last looked, but they were one of the few supporting Linux (both cli and gui).
I can even use the photo sync from multiple devices because it creates folders per phone
My company forces me to use a proxy so I must manually configure Dropbox and Copy with that proxy info even though I've already configured OS X to use the proxy. Why can't they obtain the system-wide OS X proxy info that all other (non command line) apps use?
When I'm not at work the proxy isn't available and neither Dropbox nor Copy will recognize that fact and bypass it. Instead they just hang, even though all other GUI apps are fine. I have to manually turn proxying off in each app in order to get syncing to work. It's not only a pain to do this but it's also easy to forget, and then you wind up with files you need that haven't been synced.