BitTorrent Sync... anyone used/using it ?

is it any good ?

I'm using drop box right now, and it's pretty handy

I mostly use it to transfer stuff between home/work or share with my nephew or brother...

it's much easier to just shove stuff into drop box than to bother with ftp etc... but there's a few times now I've run out of space (got 5.5gig)... I was about to pay $99/year for 100gig... but then figured BitTorrent Sync might be better... unlimited storage etc...

haven't installed it yet (in case it's crap, waiting on you guys)... but it would be pretty awesome if I could set some folders to be available at one end (but not uploaded to the other machines) but then choose to transfer them over (from the other end) ?
(this would be nice... but not essential... I can just rdt in and move things into my sunc folder like I do with dropbox right now)