I found my way to a nice 2003 SSEi thanks to Mapquest!
They've only been inaccurate two times for me over the past 4 years. I usually read over the directions and if something sounds confusing I know something is wrong. Sometimes a direction will simply say to "Take the Exit" but not tell you where, what exit, right or left, etc.
But I check with Yahoo Maps to see the differences between both, if any.