Just installed SP2 on my laptop
 

Thought I would try it out on my laptop first just to be sure. No problems at all with the install and in fact it was much faster than I thought.

Boots up faster and runs faster. Firewall asks you to authorize programs that use a socket for the first time. I like it.

And best of all (or worst) nothing pops up.

yes good for surfers bad for webmasters and sponsors that depend on pop-up traffic.