Latest firmware at the time of this writing is V2.08.
The combination of 2nd Gen Cube's firmware update V2.08 and the latest Cubify Client update offer what appears to me to be remarkably improved print quality.
While I do not know all the improvements that have been implemented, I do believe that I see much smoother curved surfaces. There are other LCD user interface changes as well.
I STRONGLY suggest that all 2nd Gen Cube users take the time to apply both updates.
It is my understanding that CubeX owners will benefit by the most recent updates for the CubeX firmware and Client software. I don't have a CubeX, so I can't verify that in person. But, if the improvements are as nice as those I'm seeing on the Cube, then it's worth checking it out.
Kudos to 3D Systems for keeping on top of improvements as well as they
have. The 2nd Gen Cube that I have today is performing even better than
when it was taken out of the box and that is a testament to 3D System's
strong commitment to it's owner base.
While I'm praising 3D Systems, let me also give them credit for the improvements in the readability of the LCD screen itself. I have 2 2nd Gen Cubes and the most recent one is much easier to see in bright light situations. It's nice to see that 3D Systems is also listening to buyers and willing to make incremental hardware changes within the model line from time to time. Nice.