Malcolm, We're in a similar boat. The project I'm working on has a pilot that starts end of March (hopefully) For 4.5 - the license component is different, service names are different, management is different (move away from cmc for instance), performance is different. Its not an 'upgrade' to 4 - it's a new code base. So really, you wouldn't update, you'd ideally start again (or uninstall/reinstall) Given we're going into pilot - with a live service anticipated q4 this year it was deemed less costly to pilot with 4.5 to realise any issues rather than to pilot and implement 4.0 to have the same exercise within almost a year. Plus the new auditing and security features were viewed as Good Things to have. From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Malcolm Bruton Sent: 02 March 2007 13:05 To: thin@xxxxxxxxxxxxx Subject: [THIN] PS 4.5 upgrade? or PS 4 Guys I know this is fairly early for definitive answers but hoping somebody has some good ideas. We are embarking on an upgrade now from XPe to PS 4.x. We had planned to go to 4 and then 4.5 later in the year. We were anticipating that the 4.5 release would be a bit late but they have surprised us with the release before the end of 1st quarter. Our pilot is not due to start till the end of March. Thought as to use PS 4 or rather 4.5 to save us some time later in the year. Concerned about using the latest bleeding edge technology. After all citrix is not known for it's pristine bug free software at the first attempt. Thoughts on if we did go with 4.5 and had problems, citrix turn around time on fixes? I guess I'm thinking a pilot is a good time to find the issues and as long as we have good turn around on fixes it shouldn't be too bad. Anyone got any good feedback already about how smooth 4.5 works or plans to implements rapidly? Any one been running the beta for a long time and found it quite reliable? I've also heard rumours that moving from 4 to 4.5 is not quite as easy as say going from PS3 to PS4 as there are that much more components and configuration to think about. Is this true?. Thanks Malcolm