I used Wuala for couple of years, when it was free and allowed earning a much larger quota by sharing own drive space to host other user's data. I used it to keep around 100GB of my personal data. Used to be good while it lasted. Encrypted, distributed, redundant. Then LaCie bought it and turned it into a Dropbox clone. Now I use AeroFS, also tried TorrentSync. Both a roughly equal. I just felt lazy changing from already running and tuned AeroFS to anything else. If you have 24x7 homeserver at home it is very hard to justify paying for storage at dropbox or skydrive or google. I built my homeserver on the latest Atom, so it is frugal (~10W) and completely silent (no fan, SSD). It's dualcore 2.1GHz and has enough grunt for simultaneous NAS, torrents, and plays 1080p mkv to the attached TV. No place for Wuala in this arrangement anymore.