1. The download is 6.23 MB.
2. MS have a simplified FAQ at http://www.microsoft.com/athome/security/spyware/software/faq.mspx
3. It installs on XP without needing a reboot.
4. It does not deal with cookies.
5. It looks an awful lot like Counterspy.
6. There is an open newsgroup for folks to talk about the product. Sadly, there are a lot of anti-MS posters there, which diminishes the value of the group a bit.