Well that being commented by a pro Apple user doesn't explain anything either. Bad GUI design (for a Windows app) and non existing theming integration, weird features and just lolish design compared to Opera and Firefox makes it no competitor at all.
It might work fine on Mac OS but in Windows it looks like a bad joke compared to heavy weighs like Opera 9.5 and FF3...
I do agree that The GUI does need to be better integrated with Windows, But remember firefox stuck out like a sore thumb on the Mac until version 3 so give Apple time and Im sure they will improve the GUI, they may already have although I have not gotten ahold of the version 4 seeds for windows yet.
Features, Besides a integrated RSS reader, what other features are you talking about that are weird?