I've just got my spanking new copy of Office 2007 two days ago. I am thinking about installing it today.
My biggest concerns revolve around Outlook 2007, more specifically, if it will work well with my Exchange 2003 server. I'm sure Microsoft consider this a key scenario and tested it, but you never know. So I went to the web to search for blogs, articles, forums, etc. talking about that case. I didn't find it much, on the specifics of running Outlook 2007 with Exchange 2003, but I found quite a few (angry) customers complaining at how slow Outlook 2007 is.
It concerns me a lot.
Outlook is probably the most used application on my machine. I depend so much on it that it would be sad if it didn't perform well. I certainly can disable indexing and the Business Contact Manager (which some people pointed as the two primary slow down reasons).
The thing with searching for information of this kind on the web is that you find clusters of people that suffered the same problem. Sometimes hundreds or thousands of people. But are those 1% of the customer base or 0.001% of the customer base? It is hard to find people praising Office 2007 or Outlook 2007.
Do you have any good/bad experience with Outlook 2007? Should I install it?