Not the parent, but a major issue with it is, it's slow.

  mike@snake:/keybase/public/mickeyc$ time ls
  index.html

  real	0m1.156s
  user	0m0.000s
  sys	0m0.000s
  mike@snake

The current client is not a syncing client like Dropbox/ownCloud, it's a network fs client.

I don't know if the slowness is due to the requirement to access the network, or the crypto, or whatever, but it will remain a toy unless they do something about it.

I understand it's very much a beta though, so that's ok.