Well to be honest the only reason we are all waiting for this is because nokia maps is not turn by turn navigation.
i have used both on n9t and n97 and i have to sygic is good but not better then maps v3.1(which ever is lastest one) on n97.

Personally im going to wait for free nokia maps turn by turn then waste my money on some thats wasting my time by say coming soon for months...