I have been trying out the demo of xTime and imported a relatively simple ms project file with 131 tasks. It took 30+ minutes to import (something that PMX and iTaskX can do in 20 seconds) and it consumed 100% of my cpu and over 500mb of RAM to do this. Further, it makes the year 2020 for any ms project file I import. Switching views is just plain painful and consumes 100% of my cpu. The program does look great, but the developers need to work on the performance.