Right now I've got several devices running BT Sync (nearly flawlessly, one might add): 2 Servers (one of them won't be renewed in 3 days, then it's just 1) 1 RPi 1 Home Server (running WS2012E) 2 MacBooks, 1 iMac, I'll add the other machines in a few days I use it to share like everything. With the server and the RPi running 24/7 I can sync files wherever I am whenever I want to. The RPi and the HomeServer are at different locations (~50km), my own Macbook travels with me, the others travel with my family/friends,... I use several different folders, sometimes read-only, sometimes full access,... It's the perfect tool, it just needs some features like sync-only-on-demand and maybe a Web-Interface and of course an iPhone-App. For some reason it's quite slow...I only get download speeds of like 2MB/s right now when I should get 4.4MB/s (which is the speed of my internet connection, the servers is somewhere in the hundreds of mbps)