Lanman1204, I have spoke with a number of customers and even assisted in some of the actual updates to 6.0.1 and everything went smooth. As long as you follow the proper steps in the upgrade process you shouldn't run into any issues. Please let me know if you have any questions or other concerns on the firmware update process.
Has anyone started using 6.0.1 in production yet?  I am leaning towards upgrading to this version, just want to know if anyone is using this version and if any issues have been noticed.  Thanks.
PS Series Firmware 6.0.1