Yes, I switched, and I'm a much happier computer user now.
Good for you! I installed Jaguar on my work Mac and haven't shut it down or rebooted it since. Sixteen days, 6 hours and 53 minutes of uptime so far and I run all kinds of alpha and beta quality software for work. Flawless performance. As a bonus, Apple gave me a cool program yesterday called, iCal. A really nice calendar application--for free!