Comment above and my review.
Re. previous comment, I had the same problem trying to install on our Lion iMac wit... MoreComment above and my review.
Re. previous comment, I had the same problem trying to install on our Lion iMac with the latest software upgrades. While the implication was that I could enter any email address when signing up for access, it would only work for me if I created a new Hotmail address. Lame. Then no spinning green "working" message forever and I signed right in.
Pros: Nice integration with Lion Macs and Apple devices (iPod/iPhone/iPad apps available) Generous free storage (7GB vs. 5GB for the other few options existing today) Mac support
Cons: Web interface clunky (I'm forced to use that on my old PowerPC machines, no Finder integration on PPC) I could not sign up without a Hotmail address (maybe another issue, just happened to work later with Hotmail?) Syncing appears to be pretty slow (it takes a long time for files to show up on all devices) Browser refresh is required to see new files after upload (Apps need refreshed too)