I have it installed and its ok. My main purpose was to handle the excel publisher and ms-word stuff that comes by email. The programs do open very quick and rendor attachments nicely. Explorer opens up but its not good enough yet to use for testing purposes.
But to try and develop a spreadsheet or work with word its a little jumpy on my box.
The installation is a snap and the good news is that if you have to use MS Office it looks like they will eventualy get it.
My hope is that they get it good enough to be able to run programs that rely on IE. The UPS shipping software and my finance software both need IE to be able to run under Wine.