I still consider MicroB the best mobile phone browser I've tried. Explorer in Lumia is pretty good but to me MicroB is still better, I do not like the browser on Symbian (808) or N9.
MicroB is showing its age but I like how it shows the full versions of the sites, the mouse mode with left-right swipe, the zooming rotating with the fingertip clockwise or the long press context menu :-)