I used Bitcasa for a bit, back in the free version. The UI left a bit to be desired, and their encryption is lacking. (See http://blog.bitcasa.com/2013/03/18/we

I used Bitcasa for a bit, back in the free version. The UI left a bit to be desired, and their encryption is lacking. (See http://blog.bitcasa.com/2013/03/18/we-dont-show-and-tell-infinite-storage-you-can-trust/ http://blog.bitcasa.com/2013/03/18/we-dont-show-and-tell-inf...). Right now it's not 100% cloud-ified, but my current favorite is AeroFS for syncing between machines. It works quite well. Here, the security risk is that someone gains access to your account and syncs all of your files to their system. I'm planning to work around the lack of a web client by installing a WebDAV server for myself, when I finally get around to it.