I'm using it in testing my designs JUST so I can report the bugs to bugzilla - not that I have a lot of faith in that since there are still missing bits of CSS2 and bugs in gecko dating back to 1998 that STILL remain unresolved. Still, the more bugs reported in beta, the less final is going to suck. HOPEFULLY it won't suck as bad as 0.89 through 2.0.0.14 did when it comes to leaking memory like a steel sieve, locking up due to memory release cycle conflicts, etc, etc. But then, I'm the guy who has to kill 2.x every 20 minutes in task manager with no extensions installed because it's hogging a whole CPU core to itself with 'not responding' (and have had this problem regardless of hardware platform or OS since I first tried 0.89 YEARS ago)
I'm still using the older version. I think it would be better to wait until the final version will be released. I also use opera from time to time.
i am still using older version and want to look at some reviews before upgrading. however i am much impressed with firefox.