One of the problems we found with going from SketchUp to XSI to CryEngine was that there were some irregularities with the textures like in the building shown below:
With PlayUp, we were able to get rid of some of these irregularities. You can see the difference with the same house model shown here:
We have a few more kinks to work out, but hope to have a mini-update for the CryEngine tools soon.