The good part about MicroB compared to say the SGS2 browser is that with the N900 you have a hardware keyboard with a backbutton and no need for a splitscreen keyboard etc. Thats what makes it so nice to browse on IMO.

Other than that the SGS2 browser is... outstandingly good. Only problem is that I havent found a way to switch useragent on it without having to repeat the process every time I launch the browser.