I have a work computer and two personal computers (one laptop and one stationary). Having sync is amazing. I can access all my documents from all computers.
My only gripe is that there are no finer control of it. I would like to define namespaces, for instance "work" namespace should have access to folders X, Y and Z whereas namespace "home" should have access to everything the work namespace has access to, but also folders X2, Y2 and Z2.
I would also like to sync more folders, like Downloads and even the contents of the home folder but I guess that will come later.
All in all, definitely worth it! But has the potential to become much better as well.