I downloaded it and exported all my tournament results to it from PT2. When I looked at them, I had lots of tournaments where I"d cashed, but the amount won showed $0.00. Also all my Full Tilt tournaments showed a buyin of $0.00.
I emailed PT3 support about this, and they told me: "Yes, we are aware of this. Tournament support is far from complete. We will be adding/fixing tournament stuff in future beta releases."
Looks like I may also not be using it for a while.