My impressions of OS X after about a month of use.
Issues (some of which can be addressed by third-party software):
* no reasonable way to write to a CD (!)
* read-only NTFS
* installation of apps can be confusing to people not familiar with macs
* no reasonable way to uninstall software along with its data
* disk volumes (dmg files) can be confusing to people not familiar with macs
* not clear whether installing a virus checker and/or firewall is important to people not familiar with macs
* window management not as nice as win 7 although Exposé is very cool
* strange that closing the last window of an app does not quit the app
* pdf files are not shown in the browser window
What's better than win 7? The unix-like shell. You can get this with cygwin under windows but it's nicer to have it built-in. Also, the remote shell login is easy to enable under mac. Not obvious how to do this with windows.