I've currently (slowly) migrating from Dropbox and BTSync to Syncthing. I'd say you might have a glitch in the matrix if BTSync is running that high without any active transfers.
On my (already battery-starved) laptop, it would always suck up 100% CPU for a few minutes on a fresh boot, and then occasionally pop up now and again.
On my (PowerPC!) NAS, it was constantly using lots of CPU and RAM, although I have a feeling plenty of that was caused by swapping to disk (NAS only has 128MB). I love the fact that BTSync have the forethought to provide a PowerPC client for people with outmoded NAS's like mine, just disappointed it was still too heavy to work reliably.
Would love it if Pulse had the option to encrypt the stored data (currently it only encrypts during transmission), so it could be used on untrusted hosts.
