I tried Opera long time ago and didn't go with it because it didn't - and still doesn't - have an option to automatically clear cache and history upon exit, only FireFox has it.
Then I tried it again a couple of months ago and I was pleasantly surprised with a cool speed dial, the way it handles media and the speed overall, it became my fave browser despite it's appetite for CPU.
But since recently I am not able to access secure sites like google, gmail, facebook.
Why do you people concentrate on making it nice looking, and adding, improving features if you can't make it work to access basic, the most popular websites? I'm using FF to post this because Opera apparently can't even access Opera website. It works one day, the following day it doesn't and I'm just fed up with it.