I downloaded the trial version of Office Ultimate 2007 first, I mainly use MS Word, my old 2003 documents opened up great and I have more options now. I have saved as Office 2003 and opened at work with 2003 and everything is the same. With Excel there are a few things to get used to, but as with alot of major changes in new releases this was expected
I then downloaded the MS Office Ultimate 2007, and I like the features although I dont realy have a use for OneNote, and Groove. Overall I feel this is a more user friendly user interface, I talked to some friends and they dont like the changes made, but they admit it is more "I am used to the old" "Why change?". I use Open Office and MS office, each one has its own perks. To me it is like getting used to a new car, the size, the functions, where the controls are. The more you use them the more at home you are with them. Overall a very good product, although over priced. Open Office=free.