Could say little in-accurate when compared with Navteq Q4 or MMI - Sygic.
Tested on Chennai-Banglore Highway and was not up-to-mark when compared with the other 2.

Would stick with Sygic-MMI Maps for the time being and Garmin Navteq Q4.
I Feel Nokia Maps also has got an update and "Cities" folder size is approx 135MB now.