Reply to Bittorrent sync

So I am trying to figure out how to use this to best effect.

What I have is a PC and a MBP and I want to have a unified traktor collection.

I mostly use my PC for doing the tedious stuff like setting beatgrids and cue points etc. However I use my MBP for playing out mostly.

So at first I thought that I should use one way sync, but I noticed that just playing a file in traktor causes traktor to write changes to it.

So I am left wondering is two way or one way better for this?