Office 2007

I downloaded the beta for MS Office 2007 and I had some Q's to anyone who has downloaded and installed it before i do it myself:
1) Have you installed it?
2) Has it screwed up your computer in any way?
3) Is it backwards compatible to Office 2003?
Thanks
1) Have you installed it?
2) Has it screwed up your computer in any way?
3) Is it backwards compatible to Office 2003?
Thanks