Having used Corel draw for the last 15 years I have become custom to its releases always having the need for a patch due to stability issues. I was concerned that I would have issues with it running on a pentium 4 machine which is around 10 years old.
Installation of X6 was straight forward enough, the difficult part for me was creating the corel account and the online verification which took a few attempts to get right.
However once installed and with the latest patches to boot. Corel was stable and running well. I am not able to tell you about the new features of x6 since I only need to use a few tools. But for me Corel Draw is the best vector based program I have used.