I'm not keen on it compared to Dolphin. A couple of sites I visited after setting it to use "Mobile mode" for display looked like a normal version of the sites, basically squashed to fit the screen rather than displaying an actual mobile version of the pages.
It also failed to switch from portrait to landscape more often than not on my Hero.
Granted, it's new and I've only had it for a few hours, so I'm probably being overly critical. It's just not for me.